Socket Bit, Insert Length 5 7/64 in, Replaceable Insert No, Metric, Tip Size 10 mm/ OVERALL LENGTH: 5.906 INCHES NOMINAL WRENCHING SURFACE SIZE: 10.0 MILLIMETERS NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.375 INCHES NOMINAL SINGLE END FEATURES PROVIDED: MANUAL TOOL WRENCHING SURFACE SHAPE: HEXAGON SINGLE END EXTERNAL SPECIAL FEATURES: BALL END MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM DRIVE SURFACE SURFACE TREATMENT: OXIDE STYLE DESIGNATOR: 187C HEXAGON