Chrome vanadium alloy steel for strength; Triple chrome plating and high polish finish; Meets and exceeds US federal standards for strength and performance; The Evercraft ratchet and socket set is a collection of most frequently used sockets. Socket Size: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm