Tormek Japanese Waterstone has a grit size of 4000 and gives a mirror finish with hardly any visible grinding marks. The fine surface polishes the edge to create the ultimate finish. This grindstone is ideal for sharpening hand tools such as wood carving tools, knives, scissors, plane irons and mortise chisels, which require minimal steel removal and superior sharpness. The unique composition of the stone provides an extremely long service life. Since it provides such a fine finish, we recommend that you do not hone the leather honing disc afterwards.