4 Piece Magnetic Spark Plug Socket Set3/8" Sq Drive WallDrive SocketsSteelForged, 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 tightFeatures: 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*. Specification: Contents -3/8"Sq Drive 63mm Sockets; 14, 16, 21mm, 16mm Thin WallFurther Information We sell a wide variety of tools and workshop equipment for both the DIY and Professional markets. Alias: ys01551