This sharpening stone is perfect for sharpening knives and various cutting tools The fast-cutting grain maintains a sharp edge on the toolCoarse - Removes burrs and pits from the edge of the blade/tool.Fine - For honing final sharp edgeFor best results, it is recommended to use a lightweight honing oil. The oil lubricates the stone and the blade for quicker results and prevents particle build-up on the stone’s surface.Fine grit on one side and coarse grit on other side.