Worst product ever, believe me! I bought them over a month ago for a new $2000 wheelset that I bought to polish my new wheelset black to customize and ease of installation. What a mistake I made when I bought them! The wrench for them is so tight that it is extremely difficult to attach and detach each clamping nut every time. It's so tight I had to hit it with a hammer and it scratched and scratched all the rims. I had 9 paint scratches on a rim, so of course it rusts! Also, all the paint on the nuts has been scratched, it's rusting! I hadn't even fitted the first tire before I checked to see if I could just use the old ones but unfortunately they didn't fit the holes on the rim and all my tires were gone so I couldn't buy new ones! I'm a very skilled person and I'll tell you that I had an assistant with me today and those nuts made mounting four tires a real nightmare! I'm so disappointed in what these things have done to my new wheels! This might be the worst purchase I've ever made! I would love to send them back but then I have to go through the process of getting them all back and who has time for that! Wow!