Impact Socket Bit, Metric, Drive Size 1/2 in, Overall Length 3 1/4 in, Tip Size 6 mm, Hex/ OVERALL LENGTH: 3.250 INCHES NOMINAL BLADE LENGTH: 1.750 INCHES NOMINAL WRENCHING SURFACE SIZE: 6.0 MILLIMETERS NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL SINGLE END FEATURES PROVIDED: POWER TOOL AND WRENCHING SURFACE SHAPE: HEXAGON SINGLE END EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE DRIVE SURFACE SURFACE TREATMENT: OXIDE