Open End Wrench, Alloy Steel, Black Oxide, Head Size 9/16 in, 5/8 in, Overall Length 7 47/64 in/ OVERALL LENGTH: 7.734 INCHES NOMINAL LARGE END HEAD THICKNESS: 0.266 INCHES NOMINAL SMALL END HEAD THICKNESS: 0.266 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.562 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.625 INCHES NOMINAL SECOND END WRENCHING SURFACE SHAPE: OVAL BOTH ENDS INTERNAL SMALL END HEAD ANGLE: 15.0 DEGREES NOMINAL LARGE END HEAD ANGLE: 15.0 DEGREES NOMINAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 104 DOUBLE HEAD SPECIFICATION/STANDARD DATA: 05047-ASME B107.100/B107.39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1 CLASS