20pcs/set 21mm wheel nut bolt head cover cap protective caps exterior decoration protecting bolts rims car tires bolted

100% it prevent the screws from rusting. it is durable and toughness easy to install, just press the nut covers straight to the bolts wheel nut covers which can both protect and decorate the wheel bolts of your car. interior diameter:21mm compatible: fits 21mm wheel bolts color:colorful