A multi-tool is the ultimate ... handy materials to restore a blade at a moment's notice (even a piece of aluminum foil can ...

It's not complicated or fancy, but it'll give your EDC (and kitchen) knives a serviceable edge whenever you need it.

from quickly refreshing a slightly dull edge to completely restoring a damaged blade, making it useful for everything from kitchen knives to sharpening multi-tool pocket knives. Whetstones give ...