Best String Trimmer Line

3 Best and Strongest Trimmer Lines

1. Husqvarna Titanium Force 0.095-Inch. The Husqvarna Titanium Force meets all our requirements for durable trimmer lines.
2. Oregon Magnum Gatorline Supertwist Line . 095-Inch. ...
3. LoNoiz Spiral Twist . 130- Inch.

Is thinner or thicker trimmer line better?

This probably comes as no surprise to anyone, but the general rule with string trimmer line size is that the tougher the application, the thicker the line needs to be. A larger diameter line increases the power and durability of the line, which leads to less breakage and wear-out.