The Victorinox Knife Sharpener with Ceramic Rolls from the makers of the original Swiss Army Knife is a safe easy way to sharpen your knives. The Victorinox Knife Sharpener features ceramic discs and two stages adjustable for pre-sharpening and fine egdes. Simply place the Victorinox 2 Stage Knife Sharpener on a flat work surface and hold the E-Z grip handle with one hand and the knife handle with the other. Insert the knife blade fully into the slot at a 90-degree angle to the sharpener and pull back a few times to sharpen. After setting the knife's edge with the carbide side use the unit's ceramic side to nicely finish the edge. The Victorinox Knife Sharpener is perfect to have on hand whenever you need a sharp honed edge on your knives.