One-handed operation ensures that your work is working properly 1/4 inch hex shank - universal Drive 1/4 inch hex shank for easy access to electric screwdrivers Quickly convert any 1/4 inch cordless electric screwdriver into a drill or grinder Universal Drive hex shank for easy access to electric screwdrivers.[Wide application] Quickly convert any 1/4 inch cordless electric screwdriver into a drill or grinder. One-handed operation ensures that your work is working properly. 0.3-6.5MM range - the chuck can be used with drills from 0.3mm to 6.5mm, making it perfect for fine drilling that is not possible with standard chucks, Weight: 0.19180216794 Pounds, Manufacturer: Tuidzljd