1, High quatity carbon steel drop forged 2, Heat treatment 3, Fully polished chrome plated Ratchet ring spanner SAE High quatity carbon steel drop forged Heat treatment Fully polished chrome plated 3/8'' * 7/16'', 1/2'' * 9/16'' , 5/8'' * 11/16'', 3/4'' * 13/16'', 7/8'' * 15/16'' Technical data