Shakespeare Professional Bulk Trimmer Line Ballistic Tri-Edged Weed Wacker String .155 Inch x 336 ft, Weed Eater String, Premium Nylon Universal with Cutter

What It Is

This is a heavy-duty .155-inch tri-edged trimmer line designed for commercial-grade string trimmers and brush cutters. It’s built for thick weeds, light brush, and high-volume trimming where standard round line wears out fast.

Fitment & Compatibility

• Diameter: .155 inch (4.0 mm) – fits most trimmers that accept line up to .155-inch. Check your trimmer’s manual for max line diameter; using too thick a line can overload the head or motor.
• Length: 336 feet – enough for multiple reloads. Works with bump-feed, fixed-line, and automatic-feed heads.
• Shape: Tri-edged (triangular cross-section) – not compatible with universal round-line-only heads. Ensure your trimmer head can hold shaped line (most bump-feed heads do).
• Brand/Model: Universal fit – no specific brand lock-in. Works with Echo, Stihl, Husqvarna, Ryobi, etc., as long as diameter matches.
• OEM vs Aftermarket: Aftermarket – not OEM for any brand. Quality is high, but warranty coverage on your trimmer may require OEM line.

Key Things to Know

• Cutting power: Tri-edged design cuts like a blade, reducing string wear and giving cleaner cuts on thick stems. Expect 2–3x longer life than round line in heavy brush.
• Installation: Easy – load like any standard line. No special tools, but you may need to soften the line in warm water if it’s stiff from cold storage.
• Common gotcha: .155-inch is too large for many homeowner-grade trimmers (most take .080–.105 inch). Using it on a light-duty trimmer can burn out the motor or break the head. Verify your trimmer’s max line size first.
• Noise/feedback: The tri-edge shape creates more vibration and noise than round line. Not a problem for short jobs, but noticeable during long sessions.

Should You Buy It

Buy this if you have a mid-to-heavy-duty gas or high-end electric trimmer (e.g., Echo SRM-225, Stihl FS 90, Husqvarna 128LD) and regularly cut thick weeds, briars, or saplings. Skip it for small electric trimmers or light yard work—it’s overkill and could damage your machine.