You probably don't think about lug nuts until you find yourself in a situation where you have to change curbside flats. As it turned out, the lug nuts I had on the 13 year old KIA I bought used were not the right ones. They were untapered, unplated, rusted and rounded, causing the wrench to slip off. Not funny. As a side note, my wheel hub caps either didn't fit or fell off earlier. With these new nuts, the caps not only fit, they stay put. The setup chart says these new Dorman nuts are just the right fit for a factory replacement, and they were right. The price was much lower than what I could get at local auto parts stores.