Kyocera Revolution Series Utility Knife Peeler Set - 4.25 Inch Razor-sharp blade stays sharper longer. Kyocera advanced ceramic blades offer superior edge retention&#44; holding their edge at least 10 times longer than other professional cutlery&#44; including high carbon steel. Will never brown foods. No metallic ions to transfer ? won?t alter the taste&#44; smell or appearance of food. Will never rust. Perfectly balanced and light&#44; reduces fatigue during repetitive cutting tasks.