Arnold .155-Inch x 18.5-Inch Professional Xtreme Trimmer Line

What It Is

A heavy-duty, professional-grade trimmer line designed for commercial and residential string trimmers. It’s built for cutting thick weeds, brush, and overgrowth, not just light grass trimming.

Fitment & Compatibility

Before buying, measure your trimmer’s line diameter and cutting swath. This line is 0.155 inches thick and 18.5 feet long – it fits trimmers that accept 0.155-inch or comparable line (e.g., 0.150–0.160-inch). Check your trimmer’s manual for the recommended line diameter; using a thicker line than specified can overload the engine or damage the head. This is an aftermarket product, not OEM, but it’s compatible with most brands (e.g., Stihl, Husqvarna, Echo, Ryobi, Troy-Bilt) as long as the diameter matches. No deck size concerns – it’s for trimmer heads, not mower decks.

Key Things to Know

• Durability: Xtreme line is tougher than standard round line, lasts longer in heavy brush, and resists fraying. Expect less frequent reloading.
• Installation: Easy to load into bump-feed or fixed-head trimmers – just cut to length and feed. No tools required, but a sharp blade helps cut cleanly.
• Common gotcha: This line is stiff; it may not work well in small or lightweight trimmers designed for thinner line (0.080–0.095 inches). It can also cause over-revving if your trimmer’s head isn’t rated for the added weight.
• Noise/vibration: The thicker line creates more vibration and noise compared to standard line – wear ear and eye protection.

Should You Buy It

Buy this if you frequently tackle heavy weeds, brambles, or woody growth and want a line that won’t snap or wear out fast. It’s overkill for weekly light grass trimming – stick with standard 0.080–0.095-inch line for that. Best for commercial users or serious homeowners with a mid-to-large trimmer (25cc+).