Open End Wrench, Alloy Steel, Satin, Head Size 9/32 in, 5/16 in, Overall Length 3 1/2 in, 15°/ OVERALL LENGTH: 3.56 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.281 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.312 INCHES NOMINAL SECOND END WRENCHING SURFACE SHAPE: OVAL BOTH ENDS INTERNAL SMALL END HEAD ANGLE: 15.0 DEGREES NOMINAL LARGE END HEAD ANGLE: 60.0 DEGREES NOMINAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 104 DOUBLE HEAD SPECIFICATION/STANDARD DATA: 05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 3 CLASS