The Swiss army knife! I was in a pinch today and I remembered I had my Wenger swiss army knife on me and it sure saved the day. (I needed the phillips head screwdriver) Although I hardly seem to use the main blade as much as the rest of the features, the entire knife sure comes in handy.
What knives are your tried and true EDC and what knives, EDC tools do you carry that really come in handy in a bind? Pliers are one of my faves.
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Ben