I like the idea of it being something that COULD get carried on to a plane (yall know those little, cheap 11-in-1 stamped steel tools off ebay etc for $1 shipped? Yeah, had one in my bag, accidentally, flying to and from my trip out to the PacNW...).
And, it'd be neat to have extra tools handy but not taking up a lot of space in a pocket, especially if going out and dont want bulging pockets...I hate bulging pockets