Open End Wrench, Alloy Steel, Black Oxide, Head Size 13/16 in, 7/8 in/ OVERALL LENGTH: 10.234 INCHES NOMINAL LARGE END HEAD THICKNESS: 0.359 INCHES NOMINAL SMALL END HEAD THICKNESS: 0.359 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.813 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.875 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