I have aftermarket rims from Enkei but the idiots who installed the wheels seemed to be using different lug nuts than the ones the tire shop sent me so once, when I needed a tire change, the garage told me they couldn't do it because they didn't have an adapter! So I panicked and tried to figure out what pattern I have exactly, but it's not that easy, so I decided to buy this whole set. As expected it includes a 6 spline adapter for my diameter and I was able to rotate the hoops. Very happy, no problems so far!