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 carbon 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. 2-in x 6-in diamond stone The ultimate sharpening stone 100% diamond ideal grit size for single stone sharpening Exceptionally flat steel sharpening surface Solid hardwood box precision built Rubber feet for secure hold to bench or table Made in USA.