9" x 20T Chainsaw Tooth Brush Cutter Blades, Weed Eater Grass Blade, Professional Grass Trimmer Head Replacement for Brush Cutters, String Trimmers, and Weed Wreckers

What It Is

This is a 9-inch, 20-tooth chainsaw-style brush cutter blade designed for heavy clearing of thick weeds, brush, saplings, and briars. It replaces standard string trimmer heads on compatible brush cutters, string trimmers, and weed wreckers.

Fitment & Compatibility

Before buying, verify these three things:

• Arbor hole size: Measure the center hole—most brush cutters use a 20mm or 25.4mm (1-inch) arbor. This blade may require an adapter ring (not included) if your trimmer’s arbor doesn’t match.
• Mounting system: Check if your trimmer uses a universal 3-hole or 4-hole pattern, or a specific brand’s quick-change system. This blade typically fits universal straight-shaft brush cutters with a standard flange nut.
• Power & shaft type: Works best on straight-shaft, curved-shaft, or dedicated brush cutters with at least 30cc engine displacement. Not for lightweight electric trimmers under 15” cutting width.

Key Things to Know

• Installation requires a pin wrench or spanner to tighten the retaining nut securely. A loose blade can detach at high RPM.
• Sharp teeth dull fast on sandy or rocky soil. Keep a file handy for field sharpening—replacement blades are cheap, so you may just swap them.
• No debris shield included. Your trimmer’s existing guard must be compatible with a metal blade (some plastic guards are not rated for blade use).
• Balance matters: After installation, spin the blade by hand to check for wobble. An unbalanced blade vibrates heavily and can damage the gearbox.

Should You Buy It

This is a great budget pick for homeowners or pros who need to clear dense, woody vegetation without buying an expensive dedicated blade. It’s not for fine trimming or manicured lawns—expect a rough cut. If your trimmer has a standard arbor and you’re comfortable with basic wrench work, it’s a solid value at $10.