This versatile electric knife sharpener is designed to safely and easily sharpen the highest quality European / American as well as Asian double - bevelled straight edge knives. Both sides of the knife blade are easily sharpened at the same time on the interlocking ceramic wheels. The Ceramic Edge also feature two manual sharpening slots for sharpening serrated edge knives and setting the edge or repairing the edge of severely damaged European / American knives. Unlike most electric knife sharpeners, this unit does not require using numerous steps to sharpen the knife and if used properly, will not scratch or damage the side of the knife.