The Kasumi 80002 Combination Whetstone with fine (3000) and superfine (8000) grits. To give your knives a professional razor sharp finish, you sharpen your knives with the #3000 fine grit, then proceed with the #8000 grit. The #8000 grit has been specially developed for super finishing Kasumi knives. The #8000 grit is almost the same grit and quality of a natural whetstone used to sharpen Japanese Samurai swords. You will find that the combination #3000/#8000 whetstone will give your Kasumi knives a beautiful mirrored edge, just like the edge of a Samurai sword. The whetstone comes with a stiff rubber base for use during sharpening. – 80002 – 2 – A30-1