Socket, 1/4 in Drive Size, 5 mm Socket Size, 6-Point, Alloy Steel, Chrome Finish/ OVERALL LENGTH: 31.9 MILLIMETERS NOMINAL WRENCHING END OUTSIDE DIAMETER: 7.9 MILLIMETERS NOMINAL DRIVE END OUTSIDE DIAMETER: 12.5 MILLIMETERS NOMINAL WRENCHING END OPENING DEPTH: 7.1 MILLIMETERS NOMINAL WRENCHING SURFACE SIZE: 5.0 MILLIMETERS NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.250 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: 169 UNIVERSAL JOINT