5-Pound Heavy Duty Square Trimmer Line 155-inch-by-492-ft, Commercial 0.155 String Trimmer Line in Spool, 0.155" Nylon Weed Eater String with Line Cutter Fits Most String Trimmer, Orange

What It Is

This is a 5-pound spool of 0.155-inch square trimmer line—heavy-duty, commercial-grade nylon string designed for high-volume trimming on tough weeds, overgrowth, and edging. The square profile cuts more aggressively than round line, and the included built-in cutter makes reloading convenient.

Fitment & Compatibility

• Line diameter: 0.155 inches. Fits most gas and commercial string trimmers that accept 0.155” line (common for Echo, Stihl, Husqvarna, Ryobi, and Craftsman). Check your trimmer’s owner manual for max line diameter—using thicker line can overload the head.
• Spool size: 492 feet total. Fits standard trimmer heads that accept pre-wound spools, but the 5-pound weight means this is intended for bulk reloading (not a universal drop-in spool). You’ll likely need to cut and wind your own lengths.
• Not a universal spool: This is bulk line on a spool, not a pre-wound replacement cartridge. If your trimmer uses proprietary cartridges (e.g., some electric Ryobi or Worx models), this won’t snap in—you’ll need to manually load.
• OEM vs aftermarket: Works with any brand that accepts 0.155” line. No fitment issues with aftermarket heads, but check your head’s line capacity (some bump-feed heads struggle with 0.155” if they’re designed for 0.080”–0.095”).

Key Things to Know

• Installation difficulty: Easy if you’re comfortable winding line by hand or with a drill. The spool includes a built-in cutter, but expect to spend 10–15 minutes loading a full head.
• Durability: Square profile resists fraying and snaps less than round line, especially on concrete or rocks. It’s stiffer than standard line—some bump-feed heads may require a few taps to release.
• Common gotcha: 0.155” is thick for electric trimmers. Most cordless or electric models max out at 0.095” or 0.105” and will bog down or break the head. Stick to gas or high-torque commercial units.
• Value: 492 feet at $36.99 is roughly 7.5 cents per foot—cheaper than buying small replacement spools, but you’re buying in bulk. Store unused line in a cool, dry place to prevent brittleness.

Should You Buy It

Buy this if you have a gas or commercial string trimmer that accepts 0.155” line and you mow large properties, frequently hit thick weeds, or want to save money by buying in bulk. Skip it if you use an electric trimmer (line is too thick) or if you prefer drop-in cartridges for quick reloads.