Description Natural Arkansas sharpening stones have been used for centuries for their unique sharpening properties. When used correctly they will provide an ultra fine polished cutting edge. This Smith's sharpening stone has a 4" length and comes in a convenient hard plastic carrying case. It is the perfect size to slip in a pocket or pack and keep your blades razor sharp on the go. Smith's Sharpeners have been providing high quality sharpening tools and supplies since 1886.