Striking Wrench, Alloy Steel, Black Oxide, Head Size 55 mm, Overall Length 13 in, 45°/ OVERALL LENGTH: 13.000 INCHES NOMINAL OUTSIDE DIAMETER: 86.0 MILLIMETERS NOMINAL HEAD THICKNESS: 38.0 MILLIMETERS NOMINAL WRENCHING SURFACE SIZE: 55.0 MILLIMETERS NOMINAL SINGLE END WRENCHING SURFACE SHAPE: 12 POINT SINGLE END INTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 13 STRIKING SPECIFICATION/STANDARD DATA: 05047-ASME B107.410 CAT 59 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 3 TYPE