Regular use of even the highest quality blades will dull their edge. This knife sharpener uses new knife sharpener technology. Unlike other knife sharpeners, this one is completely safe to use. The Power Grip suction cup means you can attach the knife sharpener to almost any surface. Suitable for sharpening kitchen knives, scissors etc, bread knives, serrated blades, suction pads and zinc blade locking handles. Read Less