General description Neilsen Impact Spline and Allen Key Hex Bit Socket Set includes heavy-duty bits manufactured from chrome molybdenum, featuring a one-piece construction for enhanced strength and durability. The black phosphate finish provides improved corrosion resistance, making this set ideal for various applications. Technical specifications Hexagon sizes: 14 mm, 17 mm, 19 mm, 21 mm, 22 mm, 23 mm, 24 mm Spline sizes (for XZN): M16, M18 Length: 55 mm Diameter: 44 mm Compatibility and accessories Suitable for both manual and impact wrenches Can be fixed on impact wrench by pin and O-ring