AC04105 8" Tri-Arc Brush Cutter Blades Compatible with Ryobi Expand-It Brush Cutter Attachment RY254BC RYBRC77 RY40255-BRC, 958-435 Replacement Reversible Blades for Weed Wacker, 2 Pack

What It Is

The AC04105 8" Tri-Arc Brush Cutter Blades are a 2-pack of aftermarket reversible blades designed for heavy-duty clearing of thick grass, brush, and light weeds, specifically for use with Ryobi Expand-It brush cutter attachments.

Fitment & Compatibility

Before buying, verify these three things:

1. Attachment type: These fit Ryobi Expand-It brush cutter attachments only (models RY254BC, RYBRC77, RY40255-BRC). They will not fit standard string trimmers or non-Expand-It systems.
2. Blade diameter: 8 inches – measure your current blade or check your attachment’s manual. If you have a 9" or 10" blade, these won’t match.
3. Mounting hole: These use a 1-inch arbor hole. Confirm your attachment’s shaft size matches. They are a direct replacement for OEM Ryobi part 958-435.

If you own a different brand (e.g., Craftsman, Echo, Husqvarna) or a non-Expand-It Ryobi, these will not fit.

Key Things to Know

• Quality vs OEM: At ~$8 per blade, these are budget aftermarket. Expect thinner steel than OEM Ryobi blades; they may dull faster in heavy brush or rocks.
• Installation difficulty: Easy – remove the nut, swap the blade, and retighten. No special tools needed. Always disconnect the spark plug or battery first.
• Reversible design: Each blade has two cutting edges. When one side dulls, flip it over for a fresh edge before replacing.
• Common gotcha: These are for brush cutting, not edging or light trimming. Using them on thin grass will cause excessive vibration and premature wear.

Should You Buy It

Buy these if you need a cheap, quick replacement for a Ryobi Expand-It brush cutter attachment and don’t mind slightly faster dulling in heavy use. They’re fine for occasional clearing of weeds and light brush, but if you frequently cut thick brush or rocks, spend more on OEM or heavier-duty aftermarket blades.