I bought a BMW that didn't have a lug wrench. I assume the previous owner lost it. There was one key in this set of keys that fitted my lock perfectly. The BMW dealer told me they would have to disassemble it to change my tires. Why don't they have a set? This wrench set saved money. BMW wanted me to pick the lock and then replace it with a new one. I recommend this keychain. And when you work for BMW, you need this to help your customers!