Box End Wrench, Alloy Steel, Satin, Head Size 3/8 in, 7/16 in, Overall Length 4 1/2 in, 15°/ OVERALL LENGTH: 4.625 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.375 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.438 INCHES NOMINAL SECOND END WRENCHING SURFACE SHAPE: 12 POINT BOTH ENDS INTERNAL WRENCHING END OFFSET ANGLE: 15.0 DEGREES NOMINAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 41 ANGULAR OFFSET DOUBLE HEAD