Socket Extension, Output Drive Size 3/8 in, Output Drive Shape Square, Output Drive Gender Male/ OVERALL LENGTH: 8.125 INCHES NOMINAL DRIVE SURFACE SIZE: 0.375 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 SUPPLEMENTARY FEATURES: INDUSTRIAL QUALITY (IQ) TOOLS PROGRAM ITEM