Socket, 3/8 in Drive Size, 9/16 in Socket Size, 6-Point, Alloy Steel, Chrome Finish/ OVERALL LENGTH: 1.922 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.562 INCHES NOMINAL SINGLE END DRIVE SURFACE SIZE: 0.375 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 SPECIFICATION/STANDARD DATA: 05047-ASME B107.1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 3 TYPE