Originally Posted By Dryer
My primary knife when hiking is a Swiss Army Classic....the tiniest one they make! Has scissors, tweezers, tooth pick, nail file, screw driver, blade, all in about an ounce.

+1 I've never needed more though I suppose if I was in some true survival situation a larger knife would be nicer to have. Hopefully I won't have such bad luck but if I do I'll just improvise.