1、White Corundum: Our sharpening stone is made of high quality white corundum, which is resistant to corrosion, heat and incisive edges after high temperature of 1250 degrees celsius and 17 processes of forging and 3 inspections. 2、Double Side Grits: The 400 grits low grit side is used for sharpening knives to quickly polish dull edges or damaged knives to flatten nicks and burrs, and the 1000 grits high grit side is used for finishing and polishing blades to sharpen them. 3、Easy to Handle: Our sharpening stone set is very easy to assemble and use. The stone only uses water to sharpen the knife, no expensive honing oil. It is a great option and can be easily cleaned with water. 4、Multifunction: Professional grade sharpening stone is suitable for almost all types of knives, kitchen knife sets, chef knives, steak knives, sondes, paring knives, sushi knives, meat cleavers, kitchen knives, Japanese knives, butcher knives, paring knives, BBQ knives, hunting knives, small folding knives, scissors, chisels, blades, straight razors. 5、Perfect Gift: If you have friends or family who love to cook, these people definitely need to use knives, which means a sharpening stone is useful, and our sharpening stone is the perfect gift for family and friends.