Oregon Magnum Gatorline 155 Trimmer Line – Heavy-Duty Square Weed Wacker String, 246-Foot Spool, Universal Fit

Oregon’s Magnum Gatorline 155 trimmer line is built for demanding professionals who need dependable performance in challenging conditions. The square profile with four sharp edges delivers cleaner passes through dense growth, while a weld-resistant outer layer helps minimize line bonding during long trimming sessions. This line is designed to be tough, long-lasting, and easy to use, so you can focus on the task at hand without frequent downtime.

The .155" diameter is a versatile choice for tackling heavier weeds and mid-sized brush. It fits a wide range of trimmer models and heads, including popular names such as Echo SRM 235 and SRM 230, Stihl FS 56 RC and FS55R, Husqvarna 128LD, DeWalt DCST970X1, Ryobi RY253SS, and Troy-Bilt TB 22. It also works with fixed-line, semi-automatic bump-feed, and automatic bump-feed heads, and it is compatible with gas, electric, corded, cordless, curved, and straight shaft trimmers.

The square design is more than a visual detail—those four edges slice through thick vegetation with momentum, helping you achieve a cleaner, more efficient cut. The high-strength inner core resists breakage, reducing interruptions and the need for frequent line changes. Additionally, the outer layer is engineered to resist bonding inside the trimmer head, a common frustration when trimming in tough, rocky or brush-filled areas.

Key benefits at a glance

• Cleaner cuts and improved pass quality thanks to four-edge square geometry
• Durable inner core reinforced with aramid fibers to reduce breakage
• Weld-resistant outer layer minimizes line bonding in the head
• Universal fit for most standard trimmer heads and shaft configurations

• Compatible with major brands and models, including Echo, Stihl, Husqvarna, Ryobi, DeWalt, and more
• Heavy-duty performance suitable for medium to heavy workloads and uneven terrain
• Long spool included (3 pounds) for extended use between reloads
• Designed for gas and electric trimmers across curved and straight shafts

In real-world use, you’ll notice the line’s ability to maintain momentum through stubborn growth, whether you’re trimming along fence lines, around hard landscaping, or clearing underbrush. While results can vary by model and conditions, the Magnum Gatorline line is positioned to support a productive workflow while preserving tool reliability and reducing downtime.

Assembly and compatibility tips

Always consult your trimmer’s manual to confirm line size and head compatibility before installation. If you are switching from a thinner line or a different shape, rechecking head clearance and bump-feed settings can help ensure smooth feeding and optimal cutting performance.