I love good tools that can do multiple things, but have seen very few that work that well for fly fishing specifically. I would like a tools with a good knife blade (I hate bad knives) that can be opened with one hand, a pair of scissors, a diamond grit file and maybe a good retractable or folding fly remover. I have thought about clippers, scales, measuring tape or pin to pick out tangles and clean hook eyes.

My question is if you could design a tool what would you include on it?