The Trimmer Head Spool is a durable replacement spool designed to fit inside the Stihl AutoCut 25‑2 trimmer head. It restores proper bump-feed operation by holding the trimmer line securely and ensuring reliable line advancement. Compatible with most FS‑series Stihl trimmers, this spool works with .080", .095", and .105" line, making it versatile for general trimming, edging, and light weed cutting.