M464 Pronto Manual Diamond Hone Sharpener. Two-stage manual knife sharpener Features Pronto's Criss Cross technology Puts a razor-sharp, stronger, more durable arch-shaped edge on both straight edge and serrated knives 100% diamond abrasive wheels that sharpen simultaneously into and out of the knife edge for a superior burr-free edge Soft Touch handle for an easy, secure grip Can be stored in a drawer . Measurements: 9.5" W x 1.25" D x 7.25" H " material="100% diamond" origin="United States"