1/4 Inch Hex Shank Keyless Drill Chuck Quick Change Adapter Converter 0.3-6.5MM (Black) Connecting link: 6.35mm(1/4 ") Hex Shank Clamping range: 0.3-6.5mm Instantly convert impact driver to hold non-quick change drill & driver bits Quickly convert your quick change hex shank driver into a drill Unlimited use in automotives, garages, warehouses, offices, homes etc.