Impact Socket Adapter, Black Oxide, Locking Yes, Output Drive Male, Square, 3/4 in/ OVERALL LENGTH: 1.906 INCHES NOMINAL DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL FIRST END DRIVE SURFACE SIZE: 0.750 INCHES NOMINAL SECOND END FEATURES PROVIDED: POWER TOOL DRIVE END SHAPE: SQUARE FIRST END INTERNAL DRIVE END SHAPE: SQUARE SECOND END EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 6 EXTERNAL-INTERNAL SPECIFICATION/STANDARD DATA: 05047-ASME B107.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 5 TYPE