TPI (20 pcs) 1/2"-20 Top Tier Black Chrome Spline Drive/Tuner Wheel/Lug Nuts w/key, C611142SD/BC-20, 1.30" Tall, 3/4" & 13/16" / 19mm & 21mm Dual Hex Key Spline Drive/Tuner Closed End Design, 1.30" Tall, 3/4" & 13/16" Hex, Cone Seat. Our black coating gives the durability of chrome with the look of satin black paint 3 layers of brilliantly leveled Nickel undercoating followed by 1 reflective layer of Chrome Cold forged and heat-treated for Optimal Hardness. Precision Threads