.155 Inch Round String Trimmer Line, Heavy Duty Commercial Weed Eater String with Line Cutter-508Ft Fits Most String Trimmer

What It Is

This is a 0.155-inch diameter, round string trimmer line designed for heavy-duty commercial use. It’s meant for clearing thick weeds, overgrowth, and light brush on walk-behind trimmers, straight-shaft trimmers, and some curved-shaft models.

Fitment & Compatibility

Before buying, verify your trimmer’s line diameter requirement—most standard trimmers accept 0.095 to 0.155 inch, but some lightweight or electric models are limited to 0.080 or 0.095 inch. Check your owner’s manual or measure the existing line. This 508-foot spool fits all trimmers that accept a universal spool or can be hand-wound onto a standard spool. It is aftermarket, not OEM, so it will not match a specific brand’s pre-cut line length or spool shape. Ensure your trimmer head can accommodate a 0.155-inch line—some heads have a maximum diameter limit printed on the head or in the manual.

Key Things to Know

• Quality: This is a heavy-duty, commercial-grade line—more durable than standard homeowner line. It resists fraying and snapping better than thinner lines, but it is stiffer, which can cause vibration or slower feeding in some heads.
• Installation: Easy to hand-wind onto most spools, but the stiff material may require soaking in warm water for 10 minutes to soften before winding, especially on small spools. The included line cutter (a small metal blade) mounts on your trimmer guard to cut line to length—check if your guard has a mounting hole.
• Common gotchas: This line is thicker and heavier than typical residential line, so it may not feed properly in auto-feed heads designed for smaller diameters. It works best with bump-feed or manual-feed heads. Also, the 508-foot spool is huge—you’ll get many refills, but storing the remaining line can be messy if you don’t have a spool holder.
• Performance: Excellent for thick weeds and brush, but overkill for light grass—it will wear down your trimmer head faster and consume more fuel or battery power.

Should You Buy It

Buy this if you have a heavy-duty trimmer (gas or high-power electric) with a bump-feed head and regularly clear thick weeds, brambles, or light brush. Skip it if you only trim light grass around a lawn or have an electric trimmer with a small-diameter line limit—you’ll get better feeding and less wear with a 0.080- or 0.095-inch line.