Service Wrench, Alloy Steel, Satin, Head Size 40 mm, Overall Length 7 5/8 in, 30°/ OVERALL LENGTH: 7.625 INCHES NOMINAL HEAD THICKNESS: 0.281 INCHES NOMINAL WRENCHING SURFACE SIZE: 40.0 MILLIMETERS NOMINAL SINGLE END HEAD ANGLE: 30.0 DEGREES NOMINAL WRENCHING SURFACE SHAPE: OVAL SINGLE END INTERNAL SPECIAL FEATURES: SATIN FINISH MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 81 SINGLE HEAD