Sharpening stones are widely used for knife sharpening, it can be used with water, so it is called wet sharpening stone; and also can be used with oil, we call them oil stone. When a sharpening stone will be used for resharpening a grinding wheel, we call it dressing stones, and for honing usage, it will be named honing stones, all these sharpening stones materials can be diamond, CBN, aluminum oxide or silicon carbide, the shape can also be made into a rectangle, triangle, round, half-round and customized, contact Mrbrianzhao to know more.