Excellent for metal based knives, scissors and other cutting tools. Dual use for both sharpening and honing - this super efficient sharpening rod is made out of advances ceramic, a material close in hardness to diamond. The material strength of this sharpening rod will provide excellent results when re-sharpening or honing the cutting edge of your metal based knives, scissors and cutting tools. When your metal based knife or cutting tool is extremely dull, first use the ribbed side of the ceramic rod to sharpen the blade by creating a finely ribbed texture on the primary cutting edge. Then use the smooth surface of the rod to hone or finish the edge. Kyocera's advanced ceramics are resistant to rust, wear, acids and alkalis. We have used these qualities to create a popular line of kitchen items including knives, peelers and package openers. With stylish yet functional designs, our Kitchen Collection of advanced ceramic utensils helps to make life easier for today's busy families.