Manufactured from high-grade chrome vanadium steel, which is aluminium free and has a high polish mirror finish. Side-Drive bi-hexagon sockets are designed to reduce stress and damage to fasteners. Spark plug sockets have rubber inserts and external hex drives. Features and Benefits Chrome vanadium steel construction lends itself to durability Side-Drive design allows for a higher level of torque Moulded plastic case makes storage, organisation and transportation of the sockets easier Polished finish makes cleaning your sockets more efficient Contents 1x 8mm socket 1x 9mm socket 1x 10mm socket 1x 11mm socket 1x 12mm socket 1x 13mm socket 1x 14mm socket 1x 15mm socket 1x 16mm socket 1x 17mm socket 1x 18mm socket 1x 19mm socket 1x 20mm socket 1x 21mm socket 1x 22mm socket 1x 23mm socket 1x 24mm socket 1x 25mm socket 1x 26mm socket 1x 27mm socket 1x 30mm socket 1x 32mm socket 1x M10 (16mm) spark plug socket 1x M14 (21mm) spark plug socket 1x ratcheting sock