This Teng Deep Impact Socket Set is manufactured from top grade chrome molybdenum alloy steel in accordance with GGG-W-660A to give top quality, professional sockets. The set contains 10 deep metric ½ inch drive 6-point impact sockets supplied on a clip rail. These sockets are ANSI standard and are suitable for automotive use. Contents: 10, 11, 12, 13, 14, 17, 19, 21, 22, 24mm.