The more your wheels get stolen the more you buy! Just kidding, I think it is really the thought that they provide a false sense of security. They won't stop someone who really wants your wheels. I've heard some say if they can't get your wheels off they will just steel the whole car. So, I don't know. I have been thinking about wheel locks as well. Mine use 19mm. I just want something that will match my chrome lugs and not look too hokey.