Ganzo coarse 320 grit sharpening stone for Ganzo Touch Pro Ultra Steel, expands the functionality of the sharpener and increases the range of tools you can sharpen. Since frequently used sharpening stones require periodic replacement, so the best choice - Ganzo-stone. With Ganzo grit 320 sharpening stone you can perform blade sharpening to restore the cutting edge. This stone is the next step in re-profiling and recovery of all knives and other tools. Large abrasive particles are effective for coarse sharpening and restoration of deformed and damaged blades. They form the angle you need very quickly and prepare the metal for finer work.