They've only done 8,000 miles but so far they're great. They look different than the other wheel bolts on my car, but it lets a would-be thief know right away that there's a lock on my wheel that's going to make their life difficult. The bolts and head are chrome plated to a high quality and the hardened steel bushing looks really solid. Of course, for safety reasons, you should get a backup socket from the manufacturer for about ten euros, but that's just the operating costs. I have compared these locks to all others available and they fit the bill in every important respect. Would easily buy again.