Oregon Mulching Blade 300 × 4.0 mm (3-tooth shredder)
What a mulching (shredder) blade does, with Oregon's 300 mm, 4 mm 3-tooth blade as the example — chopping high grass and brambles into fine debris.
In short:A mulching or shredder blade chops vegetation into short pieces as it cuts, instead of leaving long stems lying, so cleared ground looks tidier and the debris rots down faster. Oregon's 3-tooth mulching blade on our link is 300 mm across and 4.0 mm thick, in hardened steel (42–48 HRC), meeting ISO 7113, with a 20 mm adaptor. Blades this size need a powerful brush cutter rated for a 300 mm blade.
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Pros
- Leaves fine debris rather than long stems to rake
- Very sturdy 4 mm steel for brambles and dense growth
- Wide 300 mm cut on open ground
Cons
- Needs a powerful machine rated for 300 mm blades
- Throws debris further than a line head — wear a visor
- Not for saplings — use a saw blade
What a mulching blade does
A standard grass or brush blade slices stems and drops them more or less whole, so you’re left with long cut material to rake up. A mulching (or shredder) blade has shaped, tapered teeth that keep chopping the material as it falls, leaving short pieces that settle into the ground and rot down quickly. On rough ground, verges and bramble patches, that saves a lot of raking.
The example on our link
The product we link to is Oregon’s 3-tooth mulching blade, 300 mm across and 4.0 mm thick, in hardened steel (42–48 HRC), meeting ISO 7113, with a 20 mm aluminium adaptor. It was sold by Amazon when we checked in October 2026. The same blade is reviewed as our Oregon 3-tooth steel blade pick; Oregon also makes a 3 mm-thick version and a 2-tooth 300 mm shredder.
Will it fit your machine?
A 300 mm blade needs a brush cutter whose manual lists that diameter and the guard to match — usually larger petrol machines with a bike handle and a full harness. On a smaller machine, choose a 255 mm blade such as the Oregon 3-tooth 255.
Safety
Mulching blades throw chopped debris hard: wear a visor and glasses, cut-resistant boots and gloves, and keep everyone 15 m away. Fit with the correct washer and nut (how to fit a blade), and avoid kickback by cutting on the left side of the blade (kickback explained). More options in the best brush cutter blades.
More blades we cover
A heavy 300 mm, 4 mm-thick Oregon 3-tooth shredder blade (42–48 HRC, ISO 7113) — our pick for brambles, scrub and dense vegetation on powerful brush cutters.
- Type3-tooth mulching / shredder blade
- Size300 mm × 4.0 mm
- Steel hardness42–48 HRC
A budget 254 mm 3-tooth blade in 1.5 mm high-carbon steel with a 25.4 mm bore — reversible and re-sharpenable, for occasional long grass and scrub.
- Type3-tooth brush blade
- Size254 mm (10 in), 25.4 mm bore
- SteelHigh-carbon steel, 1.5 mm
A two-blade set: a 230 mm 36-tooth carbide-tipped blade for brush, brambles and young wood, plus a 255 mm 3-tooth steel blade for tall grass.
- Blades230 mm 36-tooth carbide + 255 mm 3-tooth steel
- Carbide bladeManganese steel body, tungsten-carbide tips
- Arbor adapters25.4 mm and 20 mm included
Einhell's original 3-tooth thicket blade: 255 mm, 2.5 mm thick, 25.4 mm bore — for tall, woody grass, rank growth and light scrub on Einhell brush cutters.
- Type3-tooth thicket blade
- Diameter255 mm
- Thickness2.5 mm