Made of high carbon steel - heat treated chrome plated. * Breaker bar has molded rubber handle end for a comfortable grip. * Heads Have Case-Hardened Pins and Spring-Loaded Ball Bearings Hold Sockets Securely. * Heads Flex 180 Degrees for Easy Access to Nuts and Bolts. * Long Lever Arm Provides Added Torque Removing Stubborn Nuts and Bolts.