DESC: Diamond sharpening stone. Measures 2x8 inches. The ultimate sharpening stones! 100% diamond abrasives permanently bonded to an ultra-flat steel plate. Ideal grit size for 'single-stone' sharpening. Sharpens any material: stainless steel and much more. Excellent for a wide variety of knives and tools! Precision-built solid hardwood box with cover protects stone when not in use. Rubber feet secure stone to work surface.