Features:1. 100% brand new high quality drill bit chuck, strictly full tested to ensure the best quality before shipment, safe to use2. The drill chuck adapter is made of high‑quality alloy materials, which is durable and stable, not easy to break or damage, can well fit your rotary tool and provide you with long time service3. The drill collet is unlimited used in car, garages, warehouses, offices, homes, etc. It is suitable for electric grinders with spindles of 7mm or 8mm4. The drill chuck converter is used this chuck to convert any cordless driver or impact driver into a drill or a mill. It is suitable for most power tools such as electric drill, grinder, screwdriver5. The power tool chuck is easy and quick to change accessories replacement on multi tool without changing colletsSpecification:Condition: 100% Brand NewItem Name: Drill ColletClamping Range: 0.5-3.2mmTotal Length: Approx. 20mm / 0.8inThread Diameter: Approx. 7mm / 0.3inType: 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 ColletNote: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.