This professional sharpener is designed to sharpen and revive the edge of all steel knives, whether smooth or serrated. Unlike traditional sharpening steels, this exclusive sharpener does not alter the original angle of the knife blade. Unlike electric grinding wheels, it eliminates the risk of overheating the blade, which could lead to a loss of sharpness. It straightens out the burr on the blade edge without removing excess metal, ensuring a precise and efficient sharpening process. Replacement grinding wheels are also available for added convenience.