benjammin:
what you are describing is a tool that was carried in a U.S. Air Force survival kit, I have two of them somewhere still in there military case, you can sometimes find them on e-bay, and now a company (probably China ) makes one for sale here in the U.S.
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Some people try to turn back their odometers.
Not me, I want people to know "why" I look this way
I've traveled a long way and some of the roads weren't paved