your keys they will probably share with you lot of useful information that will most likely help you understand much better the whole lock mechanism story. the short explanation would be that you stick to your key until the same works. if you for some reason fear that you are going to lose the key or that the same key may be lost or taken away from you then you can duplicate your key. you should go to your local locksmith service provider and present him with your original key along with you problem. also you should make sure that you are bringing the original key to make a copy 