1/4" Keyless Drill Bit Chuck Hex Shank Adapter Converter Quick Change 0.3-6.5mm Allows impact driver to function like regular drill and hold non-quick change drill&driver bits. AN IDEAL ACCESSORY: Turns any  cordless power screwdriver into a drill or grinder to quickly switch tasks and keep the job moving Easily locks onto and releases drill bits Allows hex drive power tools to use conventional drill bits Grips extra-fine bits from 0.3mm up to 6.5mm,holds many rotary tool accessories.