Chicago Cutlery Mouse Knife Sharpener includes 1-Each mouse knife sharpener.Chicago Cutlery MagnaSharp Mouse knife sharpener combines the technology of an easy-to-use pull-though knife sharpener with the ergonomics of a mouse. This comfortable mouse has a sliding knife sharpener so when not in use, it is safe from damage. It is small enough to store in a drawer or, better yet, the back side is a magnet so you can place it on the refrigerator, your stove, or anywhere close to your cutlery. Simply insert your fine edged knife into the sharpening slot and, while applying slight downward pressure on the knife edge, pull the knife through. Repeat this 3-4 times, and your knife edge will be realigned and sharpened. The ceramic rods in the MagnaSharp sharpener will sharpen any fine edge knife, simply, safely and conveniently. Plus, it's really cute!