Drop forged, hardened and tempered chrome vanadium steel with mirror finish. Includes sizes, metric: 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19mm and AF sizes: 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″. With storage rack.