Socket, 3/4 in Drive Size, 1 in Socket Size, 6-Point, Alloy Steel, Satin Finish/ OVERALL LENGTH: 3.500 INCHES NOMINAL WRENCHING SURFACE SIZE: 1.000 INCHES NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.750 INCHES NOMINAL SINGLE END FEATURES PROVIDED: MANUAL TOOL WRENCHING SURFACE SHAPE: 6 POINT SINGLE END INTERNAL DRIVE END SHAPE: SQUARE SINGLE END INTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 168 INTERNAL-INTERNAL