All four started to rust within the first week they were in my truck. When I first used the key, one of the twistlocks was tied so tightly it was almost impossible to fit it into the second ring of the two-piece key system. Obviously they need to be redesigned which shouldn't be that hard since they already have the basic concept. I really want to prevent others from taking the wheels off so as not to make it harder for me. WHY DOES IT RUST? Back to McGard.