Kyocera Ceramic Sharpening Rods For Steel-Based Knives and Cutting Tools Cutting with a dull knife can be unsafe. It is important to maintain your steel knives in between uses. The ultra-efficient sharpening rod is made out of advanced ceramic, a material close in hardness to diamond. The durability of this rod will provide excellent results when re-sharpening or honing the cutting edge of your metal-based knives, scissors, and cutting tools. Other Kyocera Home Sharpening Products Electric Diamond Wheel Knife Sharpener for both Kyocera ceramic or steel knives [DS-38] Manual Diamond Wheel Knife Sharpener for both Kyocera ceramic or steel knives [RSD-01] Steel Knife Sharpener for steel knives [RSN-20BK] Dual-sided Sharpening Rod The dual-sided surface of Kyocera's sharpening rods provide for sharpening and honing a blade. 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. Follow by using the smooth surface to hone or finish the edge.