Professional knife sharpener 3-angle diamond ceramic tungsten steel hand sharpening knives.Kitchen knife sharpener - 3-stage knife accessory sharpening tool 3-step knife sharpening system: We are revolutionizing the art of knife sharpening with our incredible 3-slot system! 1.Diamond sharpening bar- 2.Slot repairs and straightens damaged blades before sharpening to correct v shape.Finally- 3.Slot fine tunes for a clean sharpener. Easy to use: Whether you use your right or left hand - the ergonomic handle allows you to retrieve your cooking knives in seconds! Insert the blade into each of the slots and gently pull the blade several times for quick and effective sharpening.