Features: 1. Easy and quick to change accessories replacement on multi tool without changing collets. 2. Suitable for most power tools such as electric drill, grinder, screwdriver. 3. Use this chuck to convert any cordless driver or impact driver into a drill or a mill. 4. Unlimited used in car, garages, warehouses, offices, homes, etc. 5. Suitable for electric grinders with spindles of 7mm or 8mm. Specification: Condition: 100% Brand New Item Name: Drill Collet Clamping Range: 0.5-3.2mm Total Length: Approx. 20mm / 0.8in Thread Diameter: Approx. 7mm / 0.3in Type: Short-tail, Long-tail (optional) Application: Suitable for electric grinders with spindles of 7mm or 8mm. Not this size can not be used. Package List: 1 * Drill Collet Note: 1. If the casing between the nose and the output shaft is hollow, the length of the output shaft protruding outside must be greater than 10 mm. 2. If the casing and the output shaft of the nose are nearly and solid, the length of the output shaft protruding outside must be greater than 13 mm. 3. On a small flexible shaft, the hollow portion between the head of the flexible shaft handle and the output shaft must be larger than 13.8 mm (some small soft shafts on the market are not compatible, please pay attention when purchasing.)