Hex Key, Tip Size 9/16 in, Long Arm Length 5 3/4 in, Short Arm Length 1 3/4 in, Black Oxide/ LONG ARM LENGTH: 5.750 INCHES NOMINAL SHORT ARM LENGTH: 1.750 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.563 INCHES NOMINAL BOTH ENDS WRENCHING SURFACE SHAPE: HEXAGON BOTH ENDS EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 120 L-HANDLE