Call Holz obsessed, but if they can make something better, they will. These Heavy Duty Wheel Stud and Lug Nut kits include heat-treated studs that are longer and stronger than the stockers. The 19-millimeter open-end lug nuts are triple chrome plated. There are four studs and lug nuts per pack (enough for one wheel). FULL CAR REQUIRES 4 KITS!