Box End Wrench, Alloy Steel, Satin, Head Size 1/2 in, 9/16 in, Overall Length 9 in, 60°/ OVERALL LENGTH: 8.350 INCHES MINIMUM AND 9.000 INCHES MAXIMUM WRENCHING SURFACE SIZE: 0.500 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.562 INCHES NOMINAL SECOND END WRENCHING SURFACE SHAPE: 12 POINT BOTH ENDS INTERNAL WRENCHING END OFFSET ANGLE: 60.0 DEGREES NOMINAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 42 DEEP ANGULAR OFFSET DOUBLE HEAD SPECIFICATION/STANDARD DATA: 81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 3 CLASS AND A STYLE