LOK-ON World Class Socket SetsKincrome LOK-ON Sockets, Sets and Accessories have been engineered beyond world-class benchmarks, exceeding all international torque and lifetime standards. Offering unique patented features such as the LOK-ON Socket's ability to loosen up to 85% rounded/damaged fasteners, the LOK-ON range has been developed with both function and style in mind. Each component within the LOK-ON range includes features above and beyond the market's expectation, setting a new benchmark for the professional quality tool industry. DESCRIPTION - Manufactured from Chrome Vanadium Steel (Cr-V), hardened, tempered, chrome plated and mirror polished for corrosion protection - Hinged joint head and with 6 positive stops positions - Spring loaded ball bearing holds socket securely - Knurled handle for extra grip