Hex Key, Tip Size 5 mm, Long Arm Length 3 3/32 in, Short Arm Length 27 mm, Black Oxide/ OVERALL LENGTH: 78.0 MILLIMETERS NOMINAL WRENCHING SURFACE SIZE: 5.0 MILLIMETERS NOMINAL BOTH ENDS WRENCHING SURFACE SHAPE: HEXAGON BOTH ENDS EXTERNAL MATERIAL: STEEL OVERALL STYLE DESIGNATOR: 120 L-HANDLE SPECIFICATION/STANDARD DATA: 05047-ASME B18.3.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD