^^^ This.

I use mine for many small jobs, and it works very well so long as you know its limits and realize that most of the cutting wheels/stones/bits should be considered consumables.

I have the kit that is meant to sharpen lawnmower blades; stone wheel and a piece of plastic that sets the angle. I still prefer to just clamp the blade in a bench vise and freehand it. Works well with touching up axes, machetes, etc. too. Would not use on a knife blade...