Zweissen Ultra Two Stage Diamond Knife Sharpener System Professional two-step sharpening system using 600 and 1000 grit diamond sharpening plates to create a truly sharp edge. Knife blade holder makes it easy to get the perfect angle on your blade and creates a long lasting and sharp edge Directions for use included on the packaging, Textured, easy-grip handle Space at the base of the handle for storage utilizing a hook or carabiner Small footprint makes the Ultra easy to store, even in a drawer