The Hyper Tough 20V Max 0.065" x 16.4 ft 2-Pack Spool & Trimmer line is an ideal attachment for your string trimmers, which can make replacing the line in your Hyper Tough String Trimmer easliy. The pre-wound spools mean that there is no assembly or hand winding required for you. Just take the spool and line from the package and attach it to your string trimmer. The Hyper Tough 2 pack spool & trimmer line fits the auto single-line feed cutting system and is compatible with Hyper Tough 20V Max cordless 12 in. and 13 in. string trimmers. With material of plastics, it features a durable 0.065" line diameter and the 16.4 ft (1.7 mm x 5 m) long line offers long-lasting use. When you are ready to make repairs or tackle home-improvement projects, Hyper Tough is ready.