General description Sealey Magnetic Spark Plug Socket Set features a set of four 3/8" square drive WallDrive® sockets made from forged Chrome Vanadium steel. The sockets are designed with magnetic plug retention and an external hex, finished with a polished chrome for durability and ease of use. This set includes a thin-walled 16mm socket, ideal for tight clearance applications. Technical specifications Material: Forged Chrome Vanadium steel Drive size: 3/8" Sq Socket sizes: 14mm, 16mm, 21mm, 16mm Thin-wall Finish: Polished chrome Other information Model No.: AK65561 EAN: 5054511263121