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Our top picks
Best overall
1. Wild Badger Power 52cc 3-in-1 Kit
Best for: Brambles, vines and dense brush
Best small gas brush cutter for tall grass and weeds
2. Husqvarna 122RJ
Best for: Tall or coarse grass and weeds, with no woody stems
Best for a Greenworks attachment-capable trimmer
3. Greenworks 10-Inch Brush Cutter Attachment
Best for: You already own a Greenworks attachment-capable string trimmer
For most yards with brambles, vines and brush to clear, our first pick is the Wild Badger Power 52cc 3-in-1 Kit, a 51.7cc two-stroke brush cutter sold with a string head, a 10-inch 3-tooth steel blade and a harness. Bob Vila's tester ran it over grassy weeds and woody brush and found its cutting power about the same as, or only slightly below, the Husqvarna it named best overall. For tall grass and weeds with no woody stems, the Husqvarna 122RJ is a smaller 21.7cc machine that Husqvarna sells with a 4-tooth grass blade and a J-handle. If you already own a Greenworks attachment-capable string trimmer, the Greenworks 10-Inch Brush Cutter Attachment puts a 10-inch steel blade on it.
For battery power on weeds, vines and grass rather than woody brush, pick 4 is Wild Badger's 40V four-tool kit. Below, the machines sit side by side in one table, a second table sets out what each one cuts in its maker's own words, and a third works out the fuel mix and the battery size.
Jump to: Brush cutters side by side | What each one cuts | Fuel mix and battery size | Which blade for what | Handles and harnesses | When to cut | Safety, from the manuals
Start here: which brush cutter for your job
Take the first line that fits you; the decision chart asks the same questions in the same order.
- You already own a Greenworks attachment-capable string trimmer: Greenworks 10-Inch Brush Cutter Attachment (pick 3).
- You want battery power for weeds, vines and grass, with no woody brush: Wild Badger Power 40V 4-in-1 Kit (pick 4).
- Tall or coarse grass and weeds, with no woody stems: Husqvarna 122RJ (pick 2).
- Brambles, vines and dense brush: Wild Badger Power 52cc 3-in-1 Kit (pick 1).
Trimming grass and weeds along beds, walks and fences is a string trimmer's job, and our weed eater guide covers those machines. For woody stems past what your blade's maker covers (Bob Vila found neither of pick 1's heads did a great job past half an inch), cut by hand or with a saw: see our guides to loppers, pruning saws and chainsaws.
| Pick | Power | Blade | Handle | Best for | Our verdict | Where to buy |
|---|---|---|---|---|---|---|
| 1. Wild Badger Power 52cc 3-in-1 KitBest overall | 51.7cc gas, 50:1 mix | 10 in, 3-tooth steel | Bicycle-style handlebars | Brambles, vines and dense brush | A 51.7cc two-stroke brush cutter with a string head, a 10-inch 3-tooth steel blade and a harness, whose blade Bob Vila's tester found good for brambles and vines. | Check price on Amazon |
| 2. Husqvarna 122RJBest small gas brush cutter for tall grass and weeds | 21.7cc gas, 50:1 mix | 4-tooth grass blade | J-handle with barrier bar | Tall or coarse grass and weeds, with no woody stems | A 21.7cc two-stroke machine with a 4-tooth grass blade, a string head, a J-handle and a single harness, for tall or coarse grass but, by Husqvarna's manual, never woody stems. | Check price on Amazon |
| 3. Greenworks 10-Inch Brush Cutter AttachmentBest for a Greenworks attachment-capable trimmer | Your Greenworks powerhead | 10 in, 4-tooth steel | Auxiliary handle in the box | You already own a Greenworks attachment-capable string trimmer | A 10-inch, 4-tooth steel blade on its own shaft and gearbox that fits Greenworks attachment-capable trimmers with a 1-inch shaft on the 24V x 2, 40V, 60V and 80V platforms. | Check price on Amazon |
| 4. Wild Badger Power 40V 4-in-1 KitBest battery kit for weeds, vines and grass | 40V, 4Ah battery | 10 in, 3 teeth | Front handle (manual) | Battery power for weeds, vines and grass, with no woody brush | A 40V power head with a string trimmer, pole saw, hedge trimmer and a brush cutter whose 10-inch 3-tooth blade Wild Badger limits to pulpy weeds and vines, sold with one 4Ah battery; Reviewed, testing the version with two 20V 4Ah batteries, found its brush cutter handles thicker grass and plants. | Check price on Amazon |
The best brush cutters, by job
1. Wild Badger Power 52cc 3-in-1 Kit: best overall
Best overall
Best for: Brambles, vines and dense brush
Wild Badger Power 52cc 3-in-1 Kit
- Power: 51.7cc gas, 50:1 mix
- Blade: 10 in, 3-tooth steel
- Handle: Bicycle-style handlebars
A 51.7cc two-stroke brush cutter with a string head, a 10-inch 3-tooth steel blade and a harness, whose blade Bob Vila's tester found good for brambles and vines.
Wild Badger's kit is one 51.7cc two-stroke engine on a straight shaft that takes either of two cutting heads: a bump-feed string head, 17.7 inches across by Wild Badger's manual, and a 10-inch, 3-tooth steel blade. The listing puts the string head to work on grass and edging and the blade on tall weeds, dense growth and brush, and adds a shoulder strap and a design meant to start within five pulls. Wild Badger's manual lists narrower uses, cutting grass and light weeds, edging and decorative trimming, so the brush work rests on the listing and on Bob Vila's test. The manual gives a fuel tank of 37.20 ounces (1,100 ml) and a 50:1 fuel mix, and Wild Badger's warranty runs three years for home use and one year for commercial use.
Why it is the pick: it is the one pick here that a brush cutter roundup tested on both grassy weeds and woody brush. Bob Vila's tester ran each machine over a 1,000-square-foot patch of grassy weeds and then a patch of woody brush the same size. On the Wild Badger, the string head handled overgrown grass and coarse weeds well, the 3-tooth blade suited brambles and vines, and the cutting power came close to that of the Husqvarna 336FR that Bob Vila named its best overall, level with it or a little under. It comes with bicycle-style handlebars and a harness, its shaft is aluminum, and assembly took Bob Vila only a few minutes.
Good to know: it was the heaviest handheld cutter Bob Vila tested, its shoulder and waist straps "were a bit flimsy and lacked padding," and it took five to seven pulls to start every time. Bob Vila also found the big engine a bit louder than the others and lists it as "less efficient than higher-end models." Wild Badger's manual says the unit is "intended for occasional, household use only," and it is marked not for sale to California.
Where it loses: in Bob Vila's test, neither head did well on seedlings or weedy shrubs over half an inch thick. Bob Vila notes that it can take a sawtooth brush blade, but Wild Badger's manual calls for its own original parts and accessories and warns that others could lead to serious injury or void the warranty, and Forester, which makes such blades, also says to contact the trimmer's maker before installing any blade. For thicker stems, use loppers or a pruning saw.
2. Husqvarna 122RJ: best small gas brush cutter for tall grass and weeds
Best small gas brush cutter for tall grass and weeds
Best for: Tall or coarse grass and weeds, with no woody stems
Husqvarna 122RJ
- Power: 21.7cc gas, 50:1 mix
- Blade: 4-tooth grass blade
- Handle: J-handle with barrier bar
A 21.7cc two-stroke machine with a 4-tooth grass blade, a string head, a J-handle and a single harness, for tall or coarse grass but, by Husqvarna's manual, never woody stems.
Husqvarna's 122RJ is a 21.7cc two-stroke machine on a straight shaft that its manual calls a grass trimmer and brush cutter. By Husqvarna's page it comes with a T25 string trimmer head, a Grass 255-4 grass blade (four teeth), a J-handle with a barrier bar and a single harness, and gives 0.8 hp and a 17-inch cutting width. Its manual lists 10.6 pounds without fuel, cutting attachment and guard, and a 0.3 liter fuel tank, about 10 ounces. Smart Start and an air purge are Husqvarna's features for easier starting, and the tank is see-through so you can check the fuel level.
Why it is the pick: it is the small gas machine here for tall or coarse grass and weeds. Husqvarna's manual says the grass blade is for "all types of tall or coarse grass" and that either the grass blade or the string head cuts grass, and the 122RJ comes with both. Its 21.7cc engine is less than half the size of pick 1's 51.7cc, and Husqvarna says the J-handle with its barrier bar encourages safer working positions. No tester we read has reviewed the 122RJ, so it is here on Husqvarna's own specifications and manual; Bob Vila's buying guide puts gas brush cutters under 40cc on smaller jobs, such as keeping a weedy ditch in check or clearing a vegetable garden once the season ends.
Good to know: Husqvarna's page pitches the 122RJ for high grass and brushwood, but its manual draws two lines: grass blades and grass cutters "must not be used on woody stems," and saw blades must not be used with the J-handle. The approved cutting equipment it lists for the 122RJ is that grass blade and the T25 head, which takes 2.0 to 2.4 mm line. The manual also says to always use the harness, because it gives maximum control and decreases the risk of tiredness.
Where it loses: it is not the machine for brambles with woody canes or for saplings; pick 1 handles brush, and loppers or a pruning saw handle stems. Its tank holds about 10 ounces against pick 1's 37.20.
3. Greenworks 10-Inch Brush Cutter Attachment: best for a Greenworks attachment-capable trimmer
Best for a Greenworks attachment-capable trimmer
Best for: You already own a Greenworks attachment-capable string trimmer
Greenworks 10-Inch Brush Cutter Attachment
- Power: Your Greenworks powerhead
- Blade: 10 in, 4-tooth steel
- Handle: Auxiliary handle in the box
A 10-inch, 4-tooth steel blade on its own shaft and gearbox that fits Greenworks attachment-capable trimmers with a 1-inch shaft on the 24V x 2, 40V, 60V and 80V platforms.
Greenworks' brush cutter attachment has no motor of its own. It is a shaft with a gearbox, a 4-tooth blade of hardened steel 10 inches across, a guard and an auxiliary handle, and it fits the powerhead of a Greenworks attachment-capable string trimmer, which the listing says it converts into a brush cutter. Greenworks' manual says it fits any Greenworks attachment-capable string trimmer whose shaft is the standard 1 inch (25.4 mm), on its original 24V x 2, 40V, 60V and 80V platforms, but not machines that are modified, made by another brand or aftermarket. By the listing, the guard carries cutting height indicators, the attachment is IPX4 weather resistant, it uses Greenworks' Universal Connect system, and the powerhead is sold separately.
Why it is the pick: if you already own the powerhead, it is the most direct way to a battery brush cutter, with no second machine to buy or store. Bob Vila's buying guide points out that an extra head needs almost no storage room and gets more use out of a tool you already have. Bob Vila ran a Greenworks 80V attachment-capable trimmer with a brush cutter attachment from Troy-Bilt (not this one), and with it the trimmer handled woody brush, blackberry canes and the thicker vines with ease, up to half an inch across. Greenworks' listing names saplings, dense brush, thick grass and stubborn weeds for its own attachment.
Good to know: no tester we read has used this attachment itself; the half-inch result above is Bob Vila's, with the Troy-Bilt attachment. Runtime depends on your battery: on Bob Vila's Greenworks 80V trimmer, the 2.0 Ah battery gave 15 to 20 minutes per charge, one charge for trimming and the second for light brush cutting. Greenworks' manual says to install the guard before the blade and to wear protective gloves when you fit the blade, and Greenworks' product page offers it for "Select Greenworks Attachment-Capable String Trimmers," while the listing asks you to verify that your model is compatible before you buy.
Where it loses: it does nothing without a compatible Greenworks powerhead, and its fit list stops at Greenworks' own attachment-capable trimmers with the 1-inch shaft.
4. Wild Badger Power 40V 4-in-1 Kit: best battery kit for weeds, vines and grass
Best battery kit for weeds, vines and grass
Best for: Battery power for weeds, vines and grass, with no woody brush
Wild Badger Power 40V 4-in-1 Kit
- Power: 40V, 4Ah battery
- Blade: 10 in, 3 teeth
- Handle: Front handle (manual)
A 40V power head with a string trimmer, pole saw, hedge trimmer and a brush cutter whose 10-inch 3-tooth blade Wild Badger limits to pulpy weeds and vines, sold with one 4Ah battery; Reviewed, testing the version with two 20V 4Ah batteries, found its brush cutter handles thicker grass and plants.
Wild Badger's 40V kit is one battery power head with four attachments: a 15-inch string trimmer and edger, an 8-inch pole saw, a 16-inch hedge trimmer and a brush cutter with a 10-inch blade, sold with one 40V 4Ah battery and a charger, by the listing. Wild Badger's manual gives the brush cutter blade as 3 teeth and 10 inches across, at up to 5,500 rpm, and says the combined trimmer, pole saw and brush cutter "must be used with the strap." The same manual says the brush cutter blade "is suited only for pulpy weeds and vines" and forbids saw blades and multi-part metal cutting tools on the kit.
Why it is the pick: it is the complete battery machine here with a brush blade in the box, so there is no fuel to mix and no powerhead to own first. Reviewed's TJ Donegan tested a sibling kit with the same four attachments and cutting widths, the version with two 20V 4Ah batteries, and ran all four attachments. On the brush cutter he found it "chews through thicker grass and plants," and the batteries lasted long enough that he had to find extra tasks to drain them. Reviewed describes Wild Badger's combo kits as "similar tools" and says the main thing to check is whether a kit has one 40V battery or two 20V batteries.
Good to know: on the version it tested, Reviewed found the trigger too easy to set off. There is no multi-step start, and holding the back half of the trigger let it start by accident a few times, so Reviewed says to remove the batteries before changing attachments. Reviewed says moving between the string head and the brush blade, on the version it tested, means taking one attachment apart and reassembling it with two included tools. The version linked here runs on one 40V 4Ah battery where Reviewed's ran on two 20V 4Ah batteries; at the volts Wild Badger states, both work out to 160 watt-hours (our arithmetic, in the battery table).
Where it loses: it is a four-tool kit for a homeowner rather than a dedicated brush machine, and Wild Badger's manual says its brush blade "is suited only for pulpy weeds and vines," with no stem diameter. For brambles and brush with woody stems, pick 1.
How we chose these
We compared the machines in Amazon's catalog that are sold as brush cutters or come with a metal brush blade, by what their makers and listings say: engine or battery, blade and teeth, string head, handle, harness and fuel. Then we read the testers who ran them on brush: Bob Vila's best brush cutters roundup, whose tester cut grassy weeds and woody brush with nine products, its separate Makita brush cutter review, and Reviewed's Wild Badger 40V review. Neither Bob Vila's best overall, the Husqvarna 336FR, nor the Makita XRU16PT kit it reviewed on its own met our floor when we checked, so neither is linked here. No tester we read has used picks 2 or 3, and we say so in each.
Our floor: in stock on Amazon with no low-stock warning, and sold new by Amazon or the seller named on the listing, when we checked on November 10, 2026. Each pick met it. Specs come from the maker pages, manuals and listings, named where they appear. Handling and safety points come from the makers' own manuals and guides (Husqvarna, Wild Badger, Greenworks, Stihl and Forester), each named where it appears, and the weed timing advice from the University of California's WeedCUT guide.
Also considered: brush cutters and blades that missed the list
Wild Badger Power Gen2 52cc 3-in-1. The same 52cc engine size and 10-inch blade as pick 1, with an extra roll of trimmer line, an aluminum-alloy build and a PA debris shield, by its listing. Bob Vila tested the first-generation kit, so pick 1 is the one with a test behind it.
Forester 9-inch chainsaw-tooth brush blade. Bob Vila's best blade: 20 chainsaw teeth on a 9-inch disc, with a round file in the package. On an Echo brush cutter it "cut aggressively through brush up to 3 inches thick" and stayed sharp after hitting a few hidden rocks, though Bob Vila found it less effective where weedy grass dominated and notes that hitting hard surfaces may damage its teeth. Forester's listing says it cuts saplings, thick brush and small trees up to 2.5 inches thick, fits most straight-shaft trimmers but not curved-shaft or electric ones, needs a conversion kit on a trimmer set up with a string head, and works best on trimmers of 35cc and up. It met our floor, but none of the picks is a match for it: Husqvarna rules out saw blades with the 122RJ's J-handle, and Wild Badger's manual calls for its own parts and accessories.
The brush cutters side by side: power, blade, handle and weight
The makers describe their machines in different terms, so here is what each maker page, manual or listing gives, side by side, with the source noted where it is a tester's.
| Pick | Power | Engine or battery | Blade in the box | String head | Handle and harness | Weight as stated |
|---|---|---|---|---|---|---|
| 1. Wild Badger Power 52cc 3-in-1 Kit | Gas, two-stroke, 50:1 mix | 51.7cc | 10 in, 3-tooth steel | 17.7 in (manual); 18 in swath (listing) | Bicycle-style handlebars and harness (Bob Vila) | 19.5 lb (Bob Vila) |
| 2. Husqvarna 122RJ | Gas, two-stroke, 50:1 mix | 21.7cc, 0.8 hp | Grass 255-4 grass blade, 4 teeth | T25 head, 17 in cutting width | J-handle with barrier bar, single harness | 10.6 lb without fuel, cutting attachment and guard |
| 3. Greenworks 10-Inch Brush Cutter Attachment | Battery, through your Greenworks powerhead | 24V x 2, 40V, 60V or 80V platform | 10 in, 4-tooth hardened steel | None (an attachment) | Auxiliary handle in the box | Not listed |
| 4. Wild Badger Power 40V 4-in-1 Kit | Battery | 40V, 4Ah, one battery and a charger | 10 in, 3 teeth | 15 in trimmer and edger | Front handle and shoulder harness; used with the strap (manual) | Not listed |
What it shows: two of the four run on gas and two on a battery. Of the two gas picks, pick 1's engine is the bigger, 51.7cc against 21.7cc. Three of the four come with a 10-inch brush blade (steel on picks 1 and 3; Wild Badger does not say for pick 4), while pick 2's four-tooth blade is a grass blade. The weights are not like for like: Bob Vila lists pick 1 at 19.5 pounds, while Husqvarna's figure for pick 2 leaves out fuel, cutting attachment and guard.
What each brush cutter cuts, in its maker's words
A brush cutter's limit is set by its blade, and makers say very different amounts about it. The table puts each maker's own words beside what a tester found; the half-inch figures are Bob Vila's results, not maker limits.
| Pick or blade | Grass and weeds | Brambles, vines and brush | Woody stems, by the maker | What a tester found |
|---|---|---|---|---|
| 1. Wild Badger Power 52cc 3-in-1 Kit | String head for grass and edging; blade for tall weeds (listing) | Blade for dense growth and brush (listing) | No diameter given; the manual lists grass, light weeds, edging and trimming | Bob Vila: the 3-tooth blade suited brambles and vines; neither head did well on stems over half an inch |
| 2. Husqvarna 122RJ | Grass blade for "all types of tall or coarse grass" (manual) | Not named in the manual | Grass blades "must not be used on woody stems" (manual) | No tester we read |
| 3. Greenworks 10-Inch Brush Cutter Attachment | Thick grass and stubborn weeds (listing) | Dense brush (listing) | Saplings named, no diameter given (listing) | Bob Vila, with a different brush attachment on a Greenworks 80V trimmer: woody brush to half an inch |
| 4. Wild Badger Power 40V 4-in-1 Kit | 15 in string trimmer (listing) | Vines (manual); 10 in brush cutter blade (listing) | Blade "suited only for pulpy weeds and vines" (manual); no diameter given | Reviewed, on the two-battery version: the brush cutter "chews through thicker grass and plants" |
| Forester chainsaw-tooth blade (Also considered) | Bob Vila: less effective in weedy grass | Thick brush (listing) | Saplings and small trees up to 2.5 in (listing) | Bob Vila: brush up to 3 inches thick, on an Echo brush cutter |
What it shows: only Forester, of the machines and blades in this table, puts a number on the woody stems its blade will take. Among the picks, two makers draw a line: Husqvarna at woody stems for its grass blade, and Wild Badger, whose 40V manual says that kit's brush blade "is suited only for pulpy weeds and vines." Bob Vila's buying guide says gas brush cutters with engines larger than 40cc can take saplings up to 2 inches thick, and its answer on how to use a brush cutter is a circular saw blade for saplings 2 inches and smaller and a chainsaw for larger trees. Past what your blade's maker covers, our loppers guide and pruning saw guide take over, and the cut brush can go through a wood chipper.
Fuel mix and battery size, computed
Both gas picks run on a 50:1 mix of gasoline and two-stroke oil by their manuals; Husqvarna writes it as 2 percent. The first table works out the oil for common amounts of gasoline (our arithmetic: gasoline divided by 50) beside Husqvarna's own mixing table, and the second works out how many tankfuls a gallon of gasoline makes once its oil is added.
| Gasoline | Two-stroke oil at 50:1 (computed) | Husqvarna's mixing table |
|---|---|---|
| 1 US gallon (128 fl oz) | 2.56 fl oz | 2 1/2 fl oz |
| 2 1/2 US gallons | 6.4 fl oz | 6 1/2 fl oz |
| 5 US gallons | 12.8 fl oz | 12 7/8 fl oz |
| 5 liters | 100 ml | 0.10 liter |
| Gas pick | Fuel tank, by the maker | Tankfuls from 1 gallon of gasoline plus its 2.56 fl oz of oil (computed) |
|---|---|---|
| 1. Wild Badger Power 52cc 3-in-1 Kit | 37.20 fl oz (1,100 ml) | About 3.5 |
| 2. Husqvarna 122RJ | 0.3 liter (10.14 fl oz on Husqvarna's page) | About 12.9 |
Mix only what you will use soon. Husqvarna's manual says not to mix fuel for more than one month at a time, and Wild Badger's says mixed fuel left a month or longer can clog the carburetor or stop the engine running properly. Husqvarna's manual also warns that small errors can change the ratio drastically when you mix small quantities, so measure the oil carefully.
For a battery machine, the number that compares packs is watt-hours: volts times amp-hours (our arithmetic below).
| Battery | Volts x amp-hours | Watt-hours at the stated volts (computed) | Runtime a tester reported |
|---|---|---|---|
| 4. Wild Badger Power 40V 4-in-1 Kit, as linked here | 40 x 4.0 | 160 | Not measured |
| The two-battery version Reviewed tested | 2 x (20 x 4.0) | 160 | Long enough that Reviewed had to find extra tasks to drain it |
| The battery in Bob Vila's Greenworks 80V attachment-capable trimmer | 80 x 2.0 | 160 | 15 to 20 minutes per charge (Bob Vila) |
What it shows: a gallon of mix fills pick 1's tank about three and a half times and pick 2's about 13 times. At the volts the makers state, all three battery setups in the table come to 160 watt-hours; makers count volts differently (BLACK+DECKER, for one, says its 40V MAX packs are 36 volts nominal), so read the 160 as the setups being alike rather than as an exact energy figure. The one runtime a tester measured is Bob Vila's 15 to 20 minutes per charge on its Greenworks, with one charge for trimming and the second for light brush cutting.
Brush cutter blades: which one for grass, brush and saplings
Bob Vila's buying guide sorts brush-cutting heads into four families. Knife blades are the most common, cutting with a honed front edge, and are its choice for general brush cutting. Chisel knives, circular saw and chainsaw types among them, are smaller and more aggressive, suit heavier brush and small saplings, and want engines of about 30cc and up. Smasher blades and flails, a family that includes extra-thick trimmer line from 0.095 to 0.155 inches, work on tall, weedy grass but not on heavy, woody material. Mulching blades, with tips bent at nearly 90 degrees, are uncommon and grind up weeds, leaves and branches.
| Head or blade | Teeth | On the picks | What the maker or a tester says it is for |
|---|---|---|---|
| String head | None | Picks 1, 2 and 4 | Husqvarna: either a grass blade or the string head cuts grass. Bob Vila: thick line works on tall, weedy grass, not heavy, woody material |
| Grass blade | 4 (Stihl also lists an 8-tooth grass blade) | Pick 2 | Husqvarna: "all types of tall or coarse grass," never woody stems. Bob Vila: fewer than eight teeth for grass |
| 3-tooth blade | 3 | Picks 1 and 4 | Wild Badger: tall weeds, dense growth and brush on pick 1 (listing), but on pick 4 only pulpy weeds and vines (manual). Bob Vila: on pick 1, good for brambles and vines; a tri-blade for tall, woody shrubs |
| 4-tooth steel brush blade | 4 | Pick 3 | Greenworks: saplings, dense brush, thick grass and stubborn weeds |
| Saw blade (chisel, scratcher or chainsaw teeth) | 20 on the Forester blade | None | Bob Vila: a circular saw blade for saplings 2 inches and smaller. Forester: saplings and small trees up to 2.5 inches. Wild Badger's 40V manual: no saw blades on pick 4 |
What it shows: by these makers and Bob Vila, line and grass blades are for grass, 3- and 4-tooth blades for weeds and brush (pick 4's maker limits its 3-tooth blade to pulpy weeds and vines), and saw blades for saplings. Whichever blade you want, the machine's manual decides whether it may carry it. Forester's own advice is to check your trimmer's owner's manual or its maker to see whether it can take a blade at all and what diameter, to match the diameter of the blade that came off, and to keep the arbor size (most often 1 inch or 20 mm), adding that most homeowner machines take blades up to 9 inches. Stihl's blade chart lists Grass-4 and Grass-8 blades among its heavy grass heads, brush knives, and Scratcher and Chisel forestry saw blades.
Bike handle, J-handle or loop: handles and harnesses
The handle decides which blades a machine may carry. Stihl's blade chart allows its circular saw blades only on its FS brushcutters with a bicycle handle and a double shoulder harness, never on a J-handle or loop handle, while its other rigid blades are allowed with a J-handle, a bicycle handle, or a loop handle that has a barrier bar. Husqvarna's manual says the same of the 122RJ in its own words: do not use saw blades with the J-handle, and Wild Badger's 40V manual forbids saw blades and multi-part metal cutting tools on that kit. Forester notes that blades were historically reserved for straight-shaft gas trimmers with the bicycle handle, that curved shafts were not designed to take a blade because they have no gear head at the bottom, and that a few battery units can take one now.
- Bicycle-style handlebars (pick 1): Bob Vila lists them, with the harness, among what it liked on this machine, and its tester felt in control with the handlebars on the Husqvarna 336FR; Stihl's guide balances a bike-handle machine on its harness so the cutting attachment sits just above the ground.
- J-handle with a barrier bar (pick 2): Husqvarna says it encourages safer working positions; it takes grass blades and trimmer heads, not saw blades.
- Loop handle: Stihl's guide puts your left hand on the loop and your right on the shaft handle. Pick 3 adds its own auxiliary handle to your Greenworks trimmer.
- Harness or strap: Husqvarna says to always use the harness, Wild Badger's 40V manual says its combined tool must be used with the strap, and Stihl says to set the strap hook a hand's width under your right hip. Bob Vila found pick 1's straps a bit flimsy.
Curved shafts are out for blade work by both Forester and Wild Badger: Forester says they have no gear head at the bottom to take a blade, and Wild Badger's 52cc manual warns against fitting rigid or metal blades to a unit with a curved shaft.
When to cut weeds and brush so they do not come back
The University of California's WeedCUT guide treats string trimmers and brush cutters as a weed control method and says the timing of cuts and the interval between them may need to be worked out for each site and species. Cut annual and biennial weeds just before or at flowering, before the seed is far enough along to finish setting, which for most grasses means before the milky stage. Perennials are best cut in the vegetative stage, right before they flower, and some broadleaf perennials and grasses may need cutting three or four times a growing season to stop seed production. Regrowth can flower at a much shorter height, so the guide suggests revisiting a site every two to four weeks.
Two more of its tips: with tall growth, several cuts or quick passes keep the stalks from falling onto the cutter, and bringing the head down over cut stems a few times roughly mulches them, which covers bare soil and helps the material break down faster. The guide adds that hand pulling, grubbing or herbicide on the regrowth can make cutting more effective, and our weed killer guide includes a brush killer pick.
Brush cutter safety: what the makers' manuals say
Every point here comes from a maker's manual or guide, named in each line; read your own machine's manual before you start.
- Distance: Husqvarna's manual says to keep a minimum of 15 m (50 ft) from persons and animals while the 122RJ runs. Wild Badger's 52cc manual says to keep children, bystanders and pets beyond a 50-foot (15 m) radius and adds that even then they are "still at risk from thrown objects." Separately it warns against sweeping with the cutting line head tilted, because the engine's power "could throw objects and small stones 15 metres or more." Stihl's guide also says 50 feet or more.
- Blade thrust: Husqvarna's manual describes a blade thrust as a sudden movement of the machine to the side, forward or rearward when the blade hits something it does not cut. The risk rises where you cannot easily see the material being cut and when the blade is not sharp, and it can come with no warning when the blade snags, stalls or binds.
- Which side cuts: with a grass blade, Husqvarna's manual says to cut with the blade's left-hand side, the part between 8 and 12 o'clock, in a sideways swing from right to left. Stihl's guide also recommends cutting right to left, because the attachment turns counterclockwise.
- What to wear: Husqvarna's manual calls for approved hearing protection, approved eye protection, protective gloves, heavy-duty slip-resistant boots and, with a grass blade, head protection. Wild Badger's 52cc manual calls for safety glasses or goggles meeting ANSI/ISEA Z87.1, ear protection, heavy long pants, boots, gloves, a long-sleeve shirt, and a full face shield when needed. Stihl's guide adds a brush shield worn over protective glasses and long pants of heavy material.
- Guards: Greenworks' manual says the guard must be installed before the blade. Husqvarna's says to use only an approved cutting attachment guard and to put the transport guard on the grass blade for transport and storage, and Wild Badger's says never to remove, modify or disable a safety device.
- After you stop: Husqvarna warns that a grass blade can keep spinning after the engine stops or the throttle is released, and Wild Badger that its cutter keeps running for several seconds after the engine is switched off and not to go near the cutting head until it has come to a standstill.
- Batteries: Greenworks' manual says to remove the battery from the product to store it, and Wild Badger's 40V manual says to use only the battery and charger it lists.
Related guides
For the gloves the manuals call for, our gardening gloves guide sorts gloves by job. If clearing leaves stumps behind, our guide on how to remove a tree stump covers four ways to get them out by hand. For limbs too thick for a blade, see the chainsaw guide.
Frequently asked questions
What is the best brush cutter?
For most yards with brambles, vines and brush, the Wild Badger Power 52cc 3-in-1 Kit: a 51.7cc two-stroke engine with a string head, a 10-inch 3-tooth steel blade and a harness, which Bob Vila's tester ran over grassy weeds and woody brush. For tall grass and weeds with no woody stems, the Husqvarna 122RJ; for an owner of a Greenworks attachment-capable trimmer, the Greenworks 10-Inch Brush Cutter Attachment; and for battery power on weeds, vines and grass, the Wild Badger Power 40V 4-in-1 Kit.
What is the difference between a brush cutter and a string trimmer?
Bob Vila describes a handheld brush cutter as a string-trimmer-shaped machine with a specialized brush-cutting head and, usually, a stronger engine, and says brush cutters are heavier and more powerful than typical string trimmers. Husqvarna draws the line in one manual: its 122L is a grass trimmer and its 122RJ a grass trimmer and brush cutter, sold with a grass blade, a J-handle and a harness. For trimming grass along beds and walks, a string trimmer is the tool.
Can I put a blade on my string trimmer?
Only if its maker allows it. Forester says to check your trimmer's owner's manual or ask its maker whether it can accept a blade and what diameter, notes that curved shafts were not designed to take one, and says you will need the maker's adapter kit to fit it. Husqvarna's manual allows only its approved cutting attachments, Wild Badger's calls for its own parts and accessories, and Greenworks sells its 10-inch brush cutter attachment for its own attachment-capable trimmers with a 1-inch shaft.
How thick a stem can a brush cutter cut?
It depends on the blade, and most makers give no figure. Husqvarna says its grass blades "must not be used on woody stems," Wild Badger's 40V manual limits that kit's blade to pulpy weeds and vines, and Forester's listing gives up to 2.5 inches for its chainsaw-tooth blade. Bob Vila's buying guide says gas brush cutters with engines larger than 40cc can take saplings up to 2 inches thick, and in its tests neither of the Wild Badger 52cc's heads did a great job past half an inch, while a Greenworks trimmer with a brush attachment handled woody brush as thick as half an inch. Past what your blade's maker covers, use loppers, a pruning saw or a chainsaw.
What fuel mix does a brush cutter use?
Both gas picks here use 50:1 gasoline to two-stroke oil by their manuals, which Husqvarna writes as 2 percent. That is 2.56 fluid ounces of oil per US gallon of gasoline (our arithmetic), and Husqvarna's own mixing table rounds it to 2 1/2. Husqvarna says not to mix fuel for more than one month at a time.
How far away should people stand when you use a brush cutter?
Both gas picks' manuals say at least 50 feet. Husqvarna's manual says a minimum of 15 m (50 ft) from persons and animals, and Wild Badger's 52cc manual says to keep children, bystanders and pets beyond a 50-foot (15 m) radius, adding that even then they are "still at risk from thrown objects."
Which blade should I use for grass, brush and saplings?
Husqvarna uses a 4-tooth grass blade for tall or coarse grass and says grass blades "must not be used on woody stems." Bob Vila's 3-tooth blade test on the Wild Badger 52cc handled brambles and vines, Wild Badger limits the 3-tooth blade on its 40V kit to pulpy weeds and vines, and Bob Vila's buying guide points to a circular saw blade for saplings 2 inches and smaller. Stihl allows its circular saw blades only on its FS brushcutters with a bicycle handle and a double shoulder harness, so check your machine's manual first.
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