They work, but an experienced tire fitter can break them with tools in 5 minutes each or less. Still, with all the hype, the robbery would have been obvious. I actually ordered them thinking the key would fit the same brand of lock lugs as mine but they were different. I got new tires and the company broke the key in the lock ring. Ruined my day and cost me $40. For the most part, the company won't fix their mistake, but my boss is a co-owner of this tire business and, for his part, treats me pretty well. So my suggestion based on my experience with locks is to have a spare key as ordering a new key takes days if you are not lucky. Another possibility if the key breaks is that the tire company breaks the locking lugs and replaces them with regular nuts. Much luck!