Hex Key, Tip Size 3/8 in, Long Arm Length 6 3/4 in, Short Arm Length 1 3/8 in, Black Oxide/ LONG ARM LENGTH: 6.750 INCHES NOMINAL SHORT ARM LENGTH: 1.375 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.375 INCHES NOMINAL BOTH ENDS WRENCHING SURFACE SHAPE: HEXAGON BOTH ENDS EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 120 L-HANDLE