Allows you to hold round-shank drill bits from 0.8mm to 10mm ( 0.03-0.39 ") securely For use with any 1 / 4-inch driver, snaps easily into the power screwdriver Converts a cordless power screwdriver into a drill or grinder in seconds It can NOT be used counterclockwise and NOT suitable for or applications involving high torque load tool-less accessory allows you to quickly and easily and release, Manufacturer: EXQIOUR