Oregon Trimmer Line - 22-955 - Magnum Gatorline - Square - .155" Gauge, 1/2 lb. Donut, 42 Feet

What It Is

The Oregon 22-955 Magnum Gatorline is a .155-inch square trimmer line designed for heavy-duty cutting in gas and high-end battery trimmers. It’s sold as a 1/2 lb. donut spool with 42 feet of line, ideal for clearing thick grass, brush, and light weeds.

Fitment & Compatibility

This is aftermarket line, not OEM EGO. It fits any trimmer that accepts .155-inch line, including EGO Power+ models like the ST1511T, ST1623T, and ST1620T. Before buying, confirm your trimmer’s line gauge (check the manual or head stamp)—.155 is common for commercial-grade units but too thick for most residential corded or smaller battery trimmers (e.g., EGO ST1200). Also measure your spool capacity: a 1/2 lb. donut fits standard bump-feed heads but may not load fully into compact spools. For EGO models, you’ll need to cut your own lengths (no pre-wound spools).

Key Things to Know

• Quality: Square shape cuts faster than round line but wears quicker on abrasive surfaces. This is a premium line—holds up better than cheap polymer options.
• Installation: You must cut and wind the line yourself. EGO heads typically use 12-15 feet per side; overloading causes jamming. Use a sharp blade or scissors for clean cuts.
• Gotchas: Not compatible with EGO’s “Power Load” heads (e.g., ST1511T) unless you manually feed. The .155 gauge may be too thick for some EGO trimmers with smaller line ports (check your head’s max line size).
• Performance: Best for tall, tough grass or briars. On light lawn maintenance, it’s overkill and will wear out the head faster.

Should You Buy It

Buy this if you have a high-torque gas or battery trimmer (especially EGO’s larger models) and need serious cutting power for overgrown areas. Skip it for light trimming or if your trimmer uses .080 or .095 line—it won’t fit or will cause feeding issues.