Feature: 1. Suitable for Multiple Ryobi Cordless Trimmers Models: 18V, 24V, 40V. 2. This replacement grass trimmer line spool set is designed for Ryobi Cordless Trimmers. 3. With the auto feed system, the replacement spool eases the tedious work of hand-winding spools. 4. The spool compatible with Ryobi utilizes centrifugal force to feed the trimmer line as it is needed. 5. High-Quality 11ft/ 0.065" weed eater edger line string easily cuts through grass and weeds. Use Tips: Always wear eye protection. Unplug tool before changing, installing, or removing accessories. Please read tool instruction manual for additional safety information before using this accessory. Choking hazard, small parts keep away children under 3 years. ONLY Suitable for tender weed grass. Tough and strong weeds please use blades to trim. Does not fit any other brand of string trimmers.includes:1/6 x Replacement Weed Wacker String Line Spool