Impact Socket, Socket Size 4 1/8 in, Socket Shape 6-Point, Drive Type Impact, Drive Size 1 in/ OVERALL LENGTH: 5.500 INCHES NOMINAL WRENCHING END OUTSIDE DIAMETER: 6.000 INCHES NOMINAL WRENCHING END OPENING DEPTH: 3.125 INCHES NOMINAL WRENCHING SURFACE SIZE: 4.125 INCHES NOMINAL SINGLE END DRIVE SURFACE SIZE: 1.000 INCHES NOMINAL SINGLE END FEATURES PROVIDED: POWER TOOL WRENCHING SURFACE SHAPE: 6 POINT SINGLE END INTERNAL DRIVE END SHAPE: SQUARE SINGLE END INTERNAL MATERIAL: STEEL OVERALL STYLE DESIGNATOR: 168 INTERNAL-INTERNAL