Shakespeare Ballistic Twist Universal Twist-Shaped Trimmer Line is designed for heavy-duty use. The unique aerodynamic twist design reduces line vibration and provides a cleaner, level cut. Prevent less downtime changing out trimmer line with Shakespeare's Ballistic line. Engineered to be one of the longest-lasting and most flexible lines on the market, saving you time and money. Strong enough to also be used for edging. Fits most corded and cordless trimmers.