Forester Chainsaw Brush Cutter Blade + File Set - 9in x 20 Teeth | Fits Most Straight Shaft Trimmers | Conversion Kit Sold Separately

What It Is

This is a 9-inch, 20-tooth steel brush cutter blade designed to replace the standard string head on straight-shaft trimmers. It’s intended for heavy-duty clearing of thick weeds, brambles, and small saplings, not for lawn edging or grass.

Fitment & Compatibility

• Shaft type: Straight shaft only. Curved shaft trimmers lack the torque and attachment system to safely spin a blade.
• Mounting hole: The blade has a standard 1-inch (25.4mm) center hole. It will fit most trimmers with a 1-inch arbor (e.g., Echo, Stihl FS series, Husqvarna, Ryobi, Craftsman). Measure your existing string head’s center hole or consult your trimmer’s manual.
• Conversion kit required: This is a blade and file set only. You must buy a separate trimmer-to-blade conversion kit (usually includes a metal guard, nut, washer, and clutch adapter) if your trimmer doesn’t already have a blade-ready head.
• Not OEM: Aftermarket part. No brand-specific warranty, but it fits the vast majority of straight-shaft models with a 1-inch arbor.

Key Things to Know

• Quality: 4.5 stars across 7,500+ reviews indicates strong durability. The blade is hardened steel but will dull quickly against rocks or dirt—the included file is for touch-ups, not heavy resharpening.
• Installation difficulty: Easy if you have the conversion kit. Expect 10–15 minutes to swap the string head. You’ll need a wrench (usually 13mm or 10mm) to tighten the nut; some models require a locking pin or tool to hold the shaft.
• Common gotchas: Running a brush blade without a metal guard is dangerous and voids most trimmer warranties. The blade is not balanced out of the box—check for wobble after install and file any heavy side. It will not cut grass cleanly; use string for lawns.
• Safety: Always wear eye and leg protection. The blade can throw debris up to 50 feet.

Should You Buy It

If you own a straight-shaft trimmer and need to clear thick brush, brambles, or saplings without buying a dedicated brush cutter, this blade is a high-value, well-reviewed upgrade. Just budget for the separate conversion kit and a metal guard. Skip it if you only mow grass or have a curved shaft trimmer.