Fully heat treated chrome alloy steel with mirror polished finish. Ideal for use in confined spaces and open end gives extra access. 12 point 72- tooth ratchet head works in single directions for rapid tightening and loosening. Supplied in a blow moulded carry case. Sizes: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm.