Box End Wrench, Alloy Steel, Chrome, Head Size 1/2 in, 9/16 in, Overall Length 7 in, 0°/ OVERALL LENGTH: 6.750 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.500 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.562 INCHES NOMINAL SECOND END WRENCHING SURFACE SHAPE: 6 POINT BOTH ENDS INTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 144 STRAIGHT DOUBLE HEAD