The Utopia Survival Tool is a multi tool slim enough to fit in a wallet.  Its made of stainless steel and designed with 10 tools in 1.  Comes in a leather pouch so you do not have to worry about cutting yourself.

1. Knife
2. Saw
3. Screwdriver
4. Wrench
5. Bottle opener
6. Can opener
7. Smaller Wrench
8. Buttlerfly wrench
9. Box cutter point
10. Ruler

How many times are you looking for a screwdriver or knife?  The bottle opener pays for itself.  You couldn't break this sucker if you tried!