Check the listing for details. Dual-Grit Multi-Purpose Diamond Sharpening Stone Knife Tool Sharpener. Condition: New. Listed at 19.99 USD. Product DescriptionAbout SHARPALSharpal Inc. is a leading manufacturer of professional and patented multifunction knife and tool sharpeners for the outdoor and sports, garden and workshop, and culinary and kitchen industries. For more than 24 years we have been passionately researching and developing quality products, which provide consumers with an easy and cost-effective way to obtain a sharp edge.SHARPAL Diamond Sharpener-the fastest and most effective way to sharpen an edge!Use and CareThere is a ‘break-in’ period for diamond sharpeners. When first use, the surface will appear to be especially rough. This roughness is due to the final manufacturing process and will be removed over time without impacting performance. As the diamond surface wears down, more and more diamond grits are exposed and the sharpener cuts faster.Sharpen dry. No messy oil neededInitial break-inRough work – coarser grit; Fine work – finer gritClean surface and wipe DRYStore DRYVaried UsesStraight Knife Edge (Including Ceramic Knife)Pocket KnivesHunting KnivesFillet KnivesTactical KnivesChef’s KnivesCamp ToolsAxeHatchetMacheteGarden ToolsMower BladesLoppersShearsHoeSpadeScythesOther Edged Tools and Pointed ToolsChiselsDrillsCarbide, high speed steel, titanium, ceramics and most of super hard material