Drop-forged hardened tempered chrome vanadium with recessed panels. Polished faces. Combination ring and open spanner. Metric sizes: 6, 8, 9, 10, 11, 12, 13, 14, 17, 19 and 22mm. AF sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16" and 7/8".