Grass Gator X7155L Tri-Twist Trimmer Line, .155 Inch Diameter, 137 Ft, 1 LB, Red/White, Heavy Duty

What It Is

The Grass Gator X7155L is a heavy-duty, .155-inch diameter tri-twist trimmer line designed for commercial-grade string trimmers and brush cutters. Its twisted triangular shape cuts through thick weeds and light brush more aggressively than standard round line.

Fitment & Compatibility

• Diameter: .155-inch (4.0mm) – fits most medium to large trimmers that accept .155 or .130–.160 line. Check your trimmer’s manual for maximum line diameter; using a size too large can damage the head.
• Length: 137 ft per 1 lb spool – enough for multiple reloads. Works with bump-feed, fixed-head, and auto-feed trimmer heads.
• Brand/Machine: Universal aftermarket – compatible with any trimmer using .155 line (e.g., Echo, Stihl, Husqvarna, Ryobi, Craftsman). Not OEM-specific.
• Before buying: Confirm your trimmer head can spool .155 line (some lightweight heads max at .130). Measure your existing line’s diameter or check the manual.

Key Things to Know

• Cutting performance: Tri-twist design provides sharper cutting edge and reduced engine strain compared to round line. Best for heavy grass, blackberries, and light brush.
• Durability: Heavy-duty polymer resists fraying and snapping better than standard lines, but avoid hitting rocks or fences – it will still wear.
• Installation: Easy to feed into most heads. No special tools needed, but spooling tightly reduces tangling. Soak line in water for 30 minutes before use to improve flexibility.
• Gotcha: At .155, this line is too thick for many electric trimmers and lightweight gas trimmers. Check your trimmer’s line capacity before buying.

Should You Buy It

Buy this if you have a gas or high-power electric trimmer that accepts .155 line and you regularly clear thick weeds or overgrowth. It’s overkill for light trimming around flower beds or small lawns – use .095 or .105 line instead. At $19.99, it’s a fair value for commercial-duty line that lasts.