The MinoSharp Deluxe Whetstone has been specially developed for use with professional quality kitchen knives. If you follow the detailed instructions enclosed in the packaging, you can achieve spectacular results, even exceeding the knives, ex-factory sharpness levels! It is the recommended way to keep your knives in the best condition for use. This stone features 2 different grits - 1000 and 8000. The 1000 grit is classed as a "medium" finish and is the main stone for sharpening knives which have become blunt. The 8000 grit is classed as a "Super Fine" finish and should be used to finely hone your knives. The Profesional Knife Sharpening Kit by MinoSharp includes a deluxe whetstone, plastic holder with non-slip feet which doubles as a storage case and guide rails to keep the optimum sharpening angle.