Shakespeare Ballistic Twist .105 in. bi-component twist-shaped trimmer line strips are designed for heavy-duty use. The unique aerodynamic twist design reduces line vibration and provides a cleaner more level cut. Ballistic Twist is engineered to be one of the longest-lasting and most durable lines on the market. Ballistic Twist line is proudly made in the USA under tight quality controls.105 in. diameter is designed to fit most straight shaft gas trimmers and works with all brands to include Cub Cadet, Echo, Stihl, Husqvarna, Redmax, Ryobi, Black & Decker, Weed Eater, Poulan, MTD, and more. Includes 12 pre-measured and pre-cut 18 in. long strips.