This set is ideal for getting into those awkward places that are just impossible to get at with normal sockets. Manufactured from Chrome Vanadium Steel, heat treated and hardened with a mirror polished finish. 8 AF Crows foot wrenches. 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, and 7/8″. Sprung tensioned socket rail. Manufactured from Chrome Vanadium Steel. Heat treated. Hardened. Mirror polished finish.