How to sharpen leather tools

If your leather hand tool does not cut, I am telling you how to sharpen it. First determine the size of the area to be sharpened. Then cut a veg tan leather that size. Cut a 2 cm piece of leather at once. Then cut 800 grit, 1200 grit and 2000 grit sandpaper, respectively. Now is the time to sharpen. Fold the sandpaper over 2 cm of leather and sharpen them all in turn. Then polish the reverse sides of the leather you cut and polish both sides of the tool. Now you can cut with ease.