Socket Bit, Insert Length 5 5/8 in, Replaceable Insert No, Metric, Tip Size 12 mm/ OVERALL LENGTH: 181.0 MILLIMETERS NOMINAL BLADE LENGTH: 142.9 MILLIMETERS NOMINAL WRENCHING SURFACE SIZE: 12.0 MILLIMETERS NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL SINGLE END FEATURES PROVIDED: MANUAL TOOL WRENCHING SURFACE SHAPE: HEXAGON SINGLE END EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 187C HEXAGON