Knife Sharpening Stone Set, Premium Whetstone Sharpener 4 Side Grit 400/1000 3000/8000 with Non-Slip Base Feature: THE MOST COMPLETE SHARPENING STONES KIT FOR DAILY USE ---- The green 400-1000 grit side is suitable for any daily sharpening, such as repairing the knives with big cutting edges, and polishing the knives, the red 3000-8000 grit will help you to make the knives more smooth,the process easy and effective, high quality non-slip bamboo board to keep the stones safely in place while sharpening. ULTRA HIGH QUALITY MATERIALS ---- This grindstone made of white corundum is quicker in pulping and high in self sharpening. When the white corundum grindstone is grinded, the new edges and corners will come up very fast, and the self sharpening property is good. Therefore, the grinding wheel dressing is not very frequent, and the work efficiency can be improved,All of these could promise you will receive a complete satisfied sharpening stone and no need to waste time to return cracked product. THE MULTIPURPOSE KNIFE SHARPENER STONE CAN SHARP ANY FLAT BLADE OUT THERE ---- This sharpening stone set can sharp ANY BLADE,whether an expensive or just a cheap stainless steel kitchen knife,kitchen knife,steak knife, paring knife, sushi knife, cleaver knife, blade sharpener, straight razor, pocket knife, scissors, chisel, carving and garden tools, it can even sharp a axe and sword! So you never need to worry about terrible dull blade! EASY TO USE ---- No oil needed, just put the stone into water for 10-15 minutes before using and they are ready to use. Therefor...