The 7-piece spark plug assembly kit from Brüder Mannesmann, with a 3/8" square drive, has been designed for the precise tightening of various fasteners. Made from heavy-duty chrome-vanadium steel, this ratchet tool is built to last. The set consists of a reversible ratchet, four spark plug sockets (14 mm 12-point, 14 mm 12-point with thin-walled profile, 16 mm hexagon and 20,8 mm hexagon) and two 3/8" extensions (75 and 125 mm long). This ratchet tool and the accessories are delivered in a robust plastic case for storage.