Combination Wrench, Alloy Steel, Satin, 20 mm Head Size, 11 1/2 in Overall Length/ OVERALL LENGTH: 245.0 MILLIMETERS MINIMUM AND 295.0 MILLIMETERS MAXIMUM WRENCHING SURFACE SIZE: 20.0 MILLIMETERS 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 MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 63 OFFSET SPECIFICATION/STANDARD DATA: 0U583-SAE AS955 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND 1 CLASS AND C STYLE