>>1147889pliers i have in my tackle bag regardless, a knife is in my pocket fishing or not, the hook sharpener sits in the bag taking up as much space as a pen and not weighing much more either, and they already make a fishing reel tool kit that is not much bigger than a cellphone if any bigger.
>pic relatedbut lets be real, if your reel is actually broken to the point that you have to open it up, you probably won't be able to clean it well enough without a mini work-shop or actually fix it without a spare part on hand.