jeez.... I haven't thought about that in a long time!
I used it all the time when doing avionics work on A-4 Skyhawks in the Marines....



I seem to recall that the springs in the knife had a tendency to break, though. Maybe that was only if you used it 8 hours a day?
The aircraft had a lot of fasteners that only required a quarter-turn to open or close, so the screwdriver/bottle-opener got a lot of work. The knife got a lot of use when stripping wire insulation or cutting zip-ties to length.

thanks for the little memory jog!

Steve in Peoria, but used to be at MCAS Yuma for a few years