The Lansky Diamond/Carbide Tactical Sharpening Rod answers the call for a military-tough knife sharpening tool that combines the speed of Lanskys proven tungsten-carbide sharpeners with the compact convenience of a retractable diamond rod. Keep it with you at all times for either fast blade maintenance or as a fighting stick if the need arises. Quickly set an edge and restore your severely damaged or dull blade with the tungsten-carbide sharpener. Then refine the edge with the diamond rod. For regular maintenance, the diamond rod alone is sufficient. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.