Socket Bit, Insert Length 5 3/8 in, Replaceable Insert No, SAE, Tip Size 1/2 in, Tip Style Hex/ OVERALL LENGTH: 7.125 INCHES NOMINAL BLADE LENGTH: 5.375 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.500 INCHES NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL SINGLE END FEATURES PROVIDED: MANUAL TOOL AND WRENCHING SURFACE SHAPE: HEXAGON SINGLE END EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM DRIVE SURFACE SURFACE TREATMENT: OXIDE STYLE DESIGNATOR: 187C HEXAGON