Sliding T-Handle, Drive Size 1/2 in, Alloy Steel, Chrome, Overall Length 12 3/4 in, Standard/ OVERALL LENGTH: 13.000 INCHES NOMINAL DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL SINGLE END DRIVE END SHAPE: SQUARE SINGLE END EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 85 SLIDING T SPECIFICATION/STANDARD DATA: 05047-ASME B107.10M PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 4 CLASS