Raku Cutlery Ceramic Knife Set : 5-Inch Santoku & 3-Inch Paring Knives with Gift Box Raku's Ceramic Knives are razor sharp and stay that way! Ceramic is closer to diamonds than high carbon steel in hardness, so our ceramic knives remain razor sharp after over a year of heavy use in the Raku Cutlery test kitchen. Keep your food pure. Metal causes foods like apples and avocados to brown 6-10 faster than our ceramic knives. Ceramic knives will never rust or corrode, even with prolonged exposure to water, salt, oil, or acidic foods Our ceramic knives are lightweight, comfortable, and balanced in your hand 5" Ceramic santuko knife has anti-stick grooves on the blade (3" Paring knife doesn't have enough surface area for sticking food to be an issue)