.155 Trimmer Line Heavy Duty - Serrated Trimmer Line & Sawtooth Weedeater Line 5 LB-423 ft - Commercial Nylon Weed Eater Cord for Brush Cutters, Universal Fit with Included Line Cutter

What It Is

This is a heavy-duty, serrated .155-inch trimmer line designed for commercial-grade brush cutters and high-weed clearing. It replaces standard round line on gas or electric trimmers, offering aggressive cutting through thick grass, weeds, and light brush.

Fitment & Compatibility

• Line diameter: .155 inch (4.0 mm). Fits trimmers that accept this size—check your trimmer’s manual or head for a “max line diameter” spec. Not compatible with .065, .080, or .095 line heads.
• Universal fit: Works with most bump-feed, fixed-line, and reloadable heads, but does not fit SpeedFeed or pre-wound spool systems without rewinding.
• Length: 423 feet per 5 lb spool—enough for multiple refills on commercial or large residential trimmers.
• Brand/model: No proprietary locks; fits Echo, Stihl, Husqvarna, Ryobi, and others using .155 line. Aftermarket line—not OEM.
• What to check: Confirm your trimmer head is rated for .155 line (often marked on the head or in the manual). Heavier line may overload smaller electric trimmers.

Key Things to Know

• Serrated design: Sawtooth edges cut through thick brush and woody stems faster than round line, but wear faster on abrasive surfaces (sidewalk edges, rocks).
• Installation: Moderate difficulty—requires winding onto spool or loading into head. Includes a line cutter for trimming to length. No special tools needed.
• Weight: 5 lb spool is heavy; best for commercial users or those with multiple trimmers. Casual homeowners may prefer a smaller 1-2 lb spool.
• Common gotcha: .155 line is thick; some trimmer heads may jam or not feed properly if the line is too stiff or the head is designed for .130 or smaller. Test a short length first.

Should You Buy It

Buy this if you’re a heavy user—commercial landscaper or property owner with thick brush, blackberries, or saplings—and your trimmer supports .155 line. It’s overkill for light grass trimming and may strain small electric trimmers, but for serious clearing, it’s a durable, cost-effective choice.