Urrea sae power nut driver, 10576, 1/4″ drive, 5/16″ tip, 1 7/8″ long made with s2 steel. Urrea industrial grade power bits are designed to provide high endurance and excellent performance in industrial applications demanding the highest quality. Designed to work with power or air tools and hand tools supporting medium torques. Intermediate-hardening heat treatment. It fits well in power tools to install or remove hexagonal head bolts.