The DeWalt Black & Decker ELU 326286-00 8mm Collet & Nut Assembly is a genuine OEM replacement cutter-retaining assembly for selected routers and laminate trimmers. Designed for 8mm-shank router cutters, the collet grips the cutter securely while the nut clamps it into the router spindle, making it suitable for replacing a worn, damaged or missing original collet and nut assembly.