Combination Wrench, Alloy Steel, Satin, 5/16 in Head Size, 5 1/4 in Overall Length/ OVERALL LENGTH: 5.375 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.313 INCHES NOMINAL BOTH ENDS HEAD ANGLE: 15.0 DEGREES NOMINAL WRENCHING SURFACE SHAPE: OVAL FIRST END INTERNAL WRENCHING SURFACE SHAPE: 12 POINT SECOND END INTERNAL WRENCHING END OFFSET ANGLE: 15.0 DEGREES NOMINAL SPECIAL FEATURES: SATIN FINISH MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 63 OFFSET