Dull blades tend to slide off food and into unprotected flesh, making them a real kitchen hazard. Keep your knives sharp for enhanced performance and basic safety with this easy to use electric sharpener. By effectively realigning and polishing the blade it creates a strong, sharp edge. Electric knife sharpener with diamond-embedded grinding wheels for professional quality knife sharpening at home on both straight edge and serrated knives. 3-Step program removes worn edge, sharpens new edge and polishes edge at wider angle to create triangular razor sharp edge. 3 Year Warranty. Made in USA