The 1/4 inch Drive long reach sockets (Length 49.5 mm) have a Hex socket (6 point) end and are crafted from chrome vanadium steel with a high chrome finish. The OGV profile allows for tightening torque to be applied to the sides rather than to the angles of the nut. These sockets are for manual use only. ISO2725-1, DIN 3124, ISO 1774-1, ISO 691, ISO 1711-1.