Constructed from forged and quenched chrome vanadium steel with a corrosion-resistant sandblasted finish, high hardness and built to last This drill nut driver bit designed to tighten or loosen wing nuts, bolts, hooks quickly and effectively Universal 1/4'' hex shanks fit quick-change/release and firmly lock of standard chucks , drill, driver and screw-gun Applicable for installing in those hexagon tools, such as pneumatic screwdriver, electric screwdriver, pneumatic drill, electric drill, manual screwdriver, and more.