The original set up was: the hex key fit the doors ,trunk ,and ignition, and the round one fit the glove box. I guess the thinking was you could leave your car for service and not worry about the stuff in the glove box. Before you spend a lot on money on keys, check all your friends old (from the 60s) keys,as they only had 20-30 different keys back then. It used to be interesting to see if your key would fit your friend's car, and hide it!