The Mercer Culinary M15956 is a high-quality flattening stone designed for maintaining the sharpness of your knives. Measuring 7" x 2-1/2" x 1", this sharpening stone features a 220 grit silicon carbide surface, ideal for effective sharpening and flattening. The diagonal groove design efficiently collects removed material, ensuring a clean and precise sharpening experience. Perfect for both professional chefs and home cooks, this tool enhances the longevity and performance of your knives.