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 polished chrome finish that resists rust and corrosion. They are a must have for every tool box. GEARWRENCH® Drive Adapter, Measurement System: Imperial, 3/8 in Male Drive, 1/4 in Female Drive, 1 in Overall Length, Female x Male Adapter, Alloy Steel, Polished Chrome