Combination Wrench, Alloy Steel, Chrome, 15 mm Head Size, 9 1/4 in Overall Length/ OVERALL LENGTH: 6.181 INCHES NOMINAL WRENCHING SURFACE SIZE: 15.0 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: 81343-SAE AS955 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND 1 CLASS AND B STYLE