OGV profile socket design means more torque than a standard socket as there is a larger contact area between socket and fastenerOGV profile also means less wear on the fastener and the ratchet as torque is transmitted through the fastener flats instead of the cornersOGV profile also means less chance of rounding the fastenerStandard 7/8 inch (22mm) socketsHigh polished chrome finish designed to avoid corrosion and easy to keep cleanLifetime WarrantyWarning:Chrome sockets and adaptors should only be used with hand operated handles and ratchets