Great knives require a great sharpener to maintain an exceptionally sharp edge. The Zyliss Knife Sharpener features integrated ceramic sharpening wheels to keep your knife edges sharp to ensure the best slicing and cutting of your food. Just three or four strokes through the sharpener polishes the knife edge for a smooth, sharp finish. The non-slip base adds stability while sharpening. This sharpener is not dishwasher safe.