Hex Key, Tip Size 17 mm, Long Arm Length 6 9/64 in, Short Arm Length 61 mm, Black Oxide/ LONG ARM LENGTH: 156.0 MILLIMETERS NOMINAL SHORT ARM LENGTH: 61.0 MILLIMETERS NOMINAL WRENCHING SURFACE SIZE: 17.0 MILLIMETERS NOMINAL BOTH ENDS WRENCHING SURFACE SHAPE: HEXAGON BOTH ENDS EXTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 120 L-HANDLE