Socket Extension, Black Oxide, Overall Length 1 3/4 in, Input Drive Size 3/8 in/ OVERALL LENGTH: 1.750 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: OXIDE OVERALL STYLE DESIGNATOR: 69 RIGID SUPPLEMENTARY FEATURES: INDUSTRIAL QUALITY (IQ) TOOLS PROGRAM ITEM