Ever wished your key could do more than open doors? Instructables user Vitizop did, so he cut, chopped, and screwed a single key into a multi-tool.
Using a drill, saw, and a variety of files, Vitizop managed to make a key into a philips screwdriver, saw, bottle opener, rope cutter, and more. Keys are pretty malleable, but the process still likely takes a bit of time. Hit up Vitizop's Instructable for pictures of the process and uses, but be warned you'll only find a few simple images for a walkthrough on making this for yourself. Still, using his key as a guide it should be easy enough to replicate. If DIYing your own doesn't suit you, you can always buy your own.
multi key Utili-Key 10-in-1 Tool | Instructables
