.105" Trimmer Line w/Cutter Rotary Round Medium Spool Red (3510)

What It Is

This is a pre-wound .105" diameter trimmer line spool designed for rotary trimmers, featuring an integrated cutter for quick line advancement. It’s intended for medium-duty residential trimming on standard gas and electric string trimmers.

Fitment & Compatibility

• Line diameter: .105" (2.7 mm) – fits most trimmers that accept .080"–.110" line. Check your trimmer’s manual or head for the max line size.
• Spool type: Rotary round medium spool – common on many brands (e.g., Craftsman, Troy-Bilt, Ryobi, Echo, Husqvarna). Verify your trimmer uses a “rotary” (not bump-feed or fixed-line) head design.
• OEM vs aftermarket: Aftermarket replacement. Works as a drop-in for most OEM spools of similar size, but confirm spool width and shaft hole diameter (typically ~0.5"–0.75").
• Deck size: Not applicable (line trimmers have no deck). Instead, measure your existing spool’s outer diameter (usually 3.5"–4.5") and compare.

Key Things to Know

• Quality: .105" line is thicker than standard .080" – good for heavier weeds but may require a trimmer with enough power to spin it effectively. Check your trimmer’s line capacity.
• Installation: Tool-free – remove old spool, align tabs, and snap in. Takes 2–3 minutes. No trimming or winding required.
• Common gotcha: The built-in cutter can dull over time; if line stops advancing, inspect the cutter blade. Also, ensure the spool isn’t overfilled – too much line can jam the head.
• Price vs value: At $54.95, this is premium-priced for a single spool. Compare to multi-packs of .105" line (often $10–$20 for 3–4 spools). The cutter convenience may justify the cost for occasional users.

Should You Buy It

Buy this if you want a no-hassle, pre-wound spool with a built-in cutter for a rotary trimmer that uses .105" line, and you value quick swaps over bulk-line savings. It’s right for homeowners with medium-duty trimming needs who dislike winding line. Skip it if you trim frequently – a bulk spool and manual winding will cost far less over time.