A very important thing to keep in mind when sharpening a work tool is not to heat the tool, not to lose the tempering of the blade. A water grinding wheel is usually used for a good sharpening. The cutting angle should also be shaped according to the type of wood on which the work is done: once the appropriate cutting angle is obtained, the work is finished with an oil or water stone (here I used an oilstone). I always prefer making my own tools, choosing and forging the steels according to the work I have to do, so that I can give the tool the most appropriate shape for the work required.