A convenient whetstone that can be used from the beginning of sharpening to the finishing process.Recommended for those who want to start sharpening their knives with different grindstone (coarse).The #1000 is a two-sided whetstone that can be used on both sides of the #4000 that can be used with delicate and sharp blades.Surface: #400 (rough whetstone) / Back: #1000 (medium whetstone)To sharpen the knife professionally, start with a rough grindstone, medium finish whetstone, and then finish it with a fine grindstone. This whetstone is a rough whetstone used for the first sharpening and a medium finish whetstone that can be used for finishing.The bottom of the tray is equipped with a synthetic rubber ribbing for non-slip and stable work. It has a groove that receives the turbidity of water that occurs in sharpening your knives, keeping your kitchen clean. Boney juice is important for sharpening. The juice holder can be used effectively.After use, the whetstone is left in the holder and can be drained and dried.Whetstone with excellent grinding power and less cloggingStainless Steel Knife and Hagane Knife