Leatherman Micra key
I recently came across a Leatherman Micra and am going to convert it from the somewhat useless feminine multi-tool it was born as to something a bit more useful. Right now it looks like this:
I will be replacing the Finger nail file and Large flat head screwdriver with my car key, and the tweezers with a lock pick.
The next thing is affixing a tension wrench.