Many moons ago I had one but I would never put any personal information in it. I finally garnered enough keys to graduate to a "key ring" then it was a ring on a retractable chain, how cool is that (LOL), Finally, once in the Army I had no need for keys. The couple locks I had were combination locks. With the latest technology I have a bio-metric lock on my front door and wireless keys for the cars. I rarely carry am key. I have back up "hard keys" just in case.