Arnold Xtreme .105-Inch x 165-Foot Professional Grade String Trimmer Line

What It Is

This is a heavy-duty .105-inch diameter, 165-foot spool of professional-grade trimmer line designed for gas-powered string trimmers and brush cutters. It’s built for high-impact cutting of thick weeds, blackberries, and light brush, not for light-duty electric trimmers.

Fitment & Compatibility

Before buying, check your trimmer’s line diameter compatibility (most gas trimmers accept .080–.105 inch; .105 is the thickest common size). This line will not fit standard electric or battery trimmers that require .065–.080 inch line. It works with any brand (Husqvarna, Stihl, Echo, Ryobi, etc.) as long as the trimmer head accepts .105-inch line. Measure your existing line with calipers or a ruler—if it’s thinner, your trimmer head may not feed .105. Also confirm your head can hold a full 165-foot spool (most standard heads can, but compact heads may need to wind less).

Key Things to Know

• Durability: This is a multi-sided, serrated line that cuts aggressively and resists fraying and breaking better than round line. Expect 2–3x longer life vs. standard .095 line in heavy weeds.
• Installation: No special tools, but winding a full 165-foot spool by hand takes 10–15 minutes. Soaking the line in warm water for 5 minutes before winding reduces tangles.
• Common gotcha: This line is stiff—it may not feed well in bump-feed heads that require flexible line. If your trimmer has a fixed-length or manual-feed head, it’s perfect. For bump-feed, test a short length first.
• Noise: The serrated edges produce a louder “whirring” sound than round line—normal for this type.

Should You Buy It

Buy this if you have a gas trimmer and regularly cut tough, woody vegetation like blackberries, saplings, or overgrown ditches. It’s overkill for light grass trimming and won’t work on most electric trimmers. For heavy-duty commercial or acreage use, it’s a solid value at $16.99 for 165 feet.