MinoSharp 440/GB If ease of use is your primary consideration, the MinoSharp Black & Grey Plus Knife Hand Held Sharpener is the ideal sharpening tool for you. There are three different models, the MinoSharp, the MinoSharp Plus and the MinoSharp 3. All models can only be used for knives that are equally sharpened on both sides. They cannot be used for serrated knives or knives sharpened on one side like the Bunmei knives. All of the MinoSharps use ceramic wheels for sharpening. Features: -Excellent universal ceramic water sharpener able to restore the razor sharpness to your knife. -The MinoSharp Plus sharpener is suitable for all knives, except those that are sharpened on one side only. -It features two sharpening wheels. -The white wheel is rough/coarse and the pink wheel is medium/coarse for finishing the knife edges.