The Britool 12-point 1/2 inch sockets are crafted in chrome vanadium steel and finished in high chrome. The OGV® profile allows tightening torque to be applied to the sides rather than to the angles of the nut. This product is for manual use only. ASME B 107-1, ISO 1174-1.The Britool BRIE113702B Socket 12 Point Standard 1/2 inch Drive 7/16 inch has the following dimensions:Size: 7/16 AFLength: 38mmWeight: 45g