400 grit grade whetstone for grinding down notches, removing substantial amounts of metal, restoring damaged edges of tools and changing bevels on blades.
1000 grit grade whetstone for sharpening knives and tools that are not very dull.
3000 grit grade whetstone for removing burrs after sharpening. It gives a fine, razor-sharp edge to any tool of the knife blade. 8000 grit honing stone is perfect for the final polishing of bevels and back sides.