GEARWRENCH mechanics tools have all been designed with the professional user in mind to increase productivity, access, and strength. The sockets, ratchets, and drive tool accessories are made from alloy steel and feature a full polish chrome finish that resists rust and corrosion. They are a must have for every tool box. GearWrench 81244 3/8-Inch drive extension, 12-Inches long. Use these extensions to access hard to reach areas. Features slide button design for the sure retention of accessories. Extension is made from heat treated drop forged alloy steel for tool strength and high polish nickel chrome finish provides corrosion resistance for long tool life.