Expert Quality, 6 point sockets manufactured from chrome vanadium steel, hardened and tempered with a micro satin finish. Each socket has a knurled ring for extra grip. Display packed. Contents: 11 x Sockets: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16" Manufactured and tested generally in accordance with DIN3122 and ISO3315 Specifications