Features and Benefits: * Sharpens knives faster than conventional stones with DMTs monocrystalline diamond surface * Coarse diamond to transform a dull edge * Portable, lightweight with convenient fold and go handles, which enclose and protects the Diafold Diamond Serrated Knife Sharpener when not in use * No oil is needed-sharpen dry or with water * Durable construction will provide years of consistent performance and reliable service One tool for many tasksan excellent value for home, shop and recreational use. The Diafold Serrated Knife Sharpener not only maintains serrated edges, but also serves as a mini-steel, gut hook sharpener and conical file. Size: 1/4 to 1/16 taper. Coarse diamond (45 micron / 325 mesh) quickly restores a neglected edge. Convenient size: 9-1/2 open. 5 closed. Folding plastic handles protect sharpener when not in use. Sharpens in a fraction of the time required by conventional stones. No messy oils neededsharpen dry or with water. Durable construction will provide years of consistent performance and reliable service For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT products. Made in USA.