Forged, Chrome Vanadium steel, 3/8"Sq drive WallDrive® sockets with magnetic plug retention, external hex and polished chrome finish. Set includes thin walled 16mm socket, for where clearance is tight. Features & Benefits:Forged, Chrome Vanadium steel, 3/8"Sq drive WallDrive® sockets, polished chrome finish.Magnetic plug retention and external hex.Sockets: 14, 16, 21mm, 16mm Thin-wall.Includes thin walled 16mm socket, for where clearance is tight.Lifetime guarantee*.Model No. AK65561 Specifications: Model No AK65561 Brand: Sealey Contents: 3/8"Sq Drive 63mm Sockets; 14, 16, 21mm, 16mm Thin Wall