>>81676cutting lots of different shit. also a SAC is like $14 and weighs line 2 ounces so there's no reason not to at least have that.
Knife: cutting shit, specifically rope, and opening things neatly
Tweezers: splinters motherfucker
Scissors and File: Mani-pedi kit. Your Feet are your most important asset in the woods, treat them right
Toothpick: that beef jerkey tho
the knife and scissors are also important for blister control, trimming the moleskin and lancing the blister if that's your thing (i've heard arguments for and against lancing, i won't get into them here. however in terms of the infection aspect of lancing a sharp knife is better than wearing it open on the inside of your sock)
so that's the benefits of having a regular, fairly cheap Swiss Army Classic.