I always carry a Smith & Wesson Homeland Security titanium folder in my right front pocket, clip outside the pocket. Everyone I know, knows I carry it, so they always come to me when they need to borrow a knife. And it never fails, everyone who uses it always says it's the sharpest knife they've ever seen.

I also carry a Leatherman in a pouch on the back of my belt. Years ago, I watched a Navy Lieutenant get his tie caught in an industrial monster-sized paper shredder. A quick slice saved his bacon. Then the bonehead got mad about his tie being cut off.

I'll take ruined tie over dragged into a shredder any day.