Mini Keyless Drill Chuck 0.3-8mm 1/4" Hex Shank Self-Tighten Electric Drill Bits Collet Fixture Tools Quick Change Converter Description: 100% New and High Quality Type: Keyless Drill Chuck Adapter Material: Alloy Shank Size : Hex / Round Shank Size: 0.3-6.5mm Hex Shank-Black 0.3-3.6mm Hex Shank-Black 0.3-3.4mm Round Shank-2.35mm 0.3-3.4mm Round Shank-3mm 0.3-6.5mm Hex Shank-White 0.6-8mm Hex Shank-Black 0.3-3.6mm Hex Shank-White Specifications: 1. Keyless chuck finger-tightens for easy bit changes. 2. Available In Electric Grinder, Nail Machine, Engraving Machine. 3. Unlimited Use In Automotives,Garages,Warehouses,Offices,Homes Etc. 4. Instantly convert impact driver to hold non-quick change drill and driver bits. 5. Available In Electric Grinder, Nail Machine, Engraving Machine Package Included: 1* Drill Chuck Adapter