Manufactured from hardened & tempered Chrome Vanadium steel with a fully polished mirror finish. 12-Point ratchet/fixed Wall Drive® ring ends. 72-Tooth ratchet requires only 5° rotation to pick up the next tooth. Wall Drive® rings grip the wall, not the corners, giving up to 30% more torque. Supplied in storage tray. Contents: 8, 10, 12, 13, 14, 17, 19mm Minimum Length: 240mm Maximum Length: 420mm>