Made of a dual grit fast-cutting silicon carbide abrasive, the Norton Crystolon Premium Tool & Knife Benchstone is ideal for sharpening knives and handheld tool blades. Use the coarse side of the stone to repair badly damaged edges then use the fine side to produce an even sharper edge. Achieve enhanced sharpening action with the use of oil, allowing for fast stock removal and quick sharpening with minimal loading. These benchstones are packaged for retail, facilitating use in vending machines, tool cribs, and your tool box.