My "pocket" knife... a free advertising hand out from Dupont Plastic Resins division that actually cuts pretty good, but I don't care if I use for a screw driver. The knife I depended on, to get me out of a bind... top end Leatherman that now resides on the bottom of Spawning Lake, Temagami, in it's leather case.
That reminds me what to ask for.. for me birthday ! Scuba tanks...... or a new leatherman !