The BlueSpot 10 Pce 1/2" Metric Deep Impact Sockets (10-24mm) are manufactured from heat treated, tempered chrome vanadium steel for strength and durability. Ideal for use with impact guns and high torque air tools. Deep impact socket for increased range and precision. Contains socket sizes: 10, 11, 13, 14, 17, 18, 19, 21, 22, 24mm. Complete with handy carrying case for quick and easy storage.