The King Gator socket is engineered to withstand over 450 ft. lbs. of torque. Each 1.25″ diameter socket contains 54 spring-biased hardened steel pins. When placed onto a fastener the center pins retract and the outer pins surround the fastener. As the fastener is turned the torque is transmitted through the outer pins to the walls of the socket. Professional grade universal socket Removes rusted and damaged bolts Will grip any style nut or bolt Fits both standard and metric sockets from 7/16-inch (12mm) to 1.25-inches (32mm)