Socket Extension, Output Drive Size 1/4 in, Output Drive Shape Square, Output Drive Gender Male/ OVERALL LENGTH: 6.000 INCHES NOMINAL DRIVE SURFACE SIZE: 0.250 INCHES NOMINAL BOTH ENDS FEATURES PROVIDED: MANUAL TOOL DRIVE END SHAPE: SQUARE FIRST END INTERNAL DRIVE END SHAPE: SQUARE SECOND END EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 70 FLEXIBLE SPECIFICATION/STANDARD DATA: 05047-ASME B107.10 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS AND B STYLE