Bought these for my Toyota pickup with non-original wheels. The coating looks good, but it's hard to say how long it will last. One of the ledges had a crafting burr sufficient to prevent it from being knocked by a nest. I'm not picky about nuts. I never put air pressure on them, always manually remove and tighten them. So they should last a long time. I don't keep the truck in the garage even in the winter because I don't want it to rust lest the nuts be permanently melted by salt ice every night. how long will they last Just take a look.