For use with power drills to speed up head change time! Chrome-plated and drop-forged for extreme durability, the Bit Key has a 1/4 inch hexagonal shaft for use with most cordless drills and screwdrivers. It makes head changing a snap. Evans Drill Bit Key is designed to fit most variable speed cordless drills and screwdrivers. Like the drum key, the bit key has a rattle-free design and is drop-forged. • MFSKU DABK • UPC 019954933685