Sharpen and improve cutting tool edges with the Norton Soft Arkansas Stone Precision Benchstone. Made from novaculite quarried in Arkansas, these Soft Arkansas stones are the coarsest-grained and least dense of the natural stones, best used with oil to achieve sharp, even, polished edges, frequently after sharpening with synthetic stones. Ideal for use on cutting, engravers, and die makers tools; laboratory blades; surgical instruments; and pocket knives.