External Spline Shanked Conical Seat Chrome 1/2×20 Closed End Lug Nuts. #LUGSHKSPL1/2X20. Lugs are priced and sold individually.  Specifications: ~20mm wide at base – Shank width ~15.5mm – Shank length ~7.5mm  – ~43mm tall. External spine drive lug key required. Key sold separately. Use Key #WM3141KEY. Hand tighten only, Never use Impact Guns.