TimHome Eco-friendly and High-quality Zirconia 4 Inch/5 Inch/6 Inch Utility Kitchen Chef's Ceramic Knives for Slicing Paring with Plastic Blade Cover (4 inch, Green) Anti-bacterial! No chemical reaction with food and no metal in your food! Ceramic knives never rust, stain or change the taste of food like traditional metal knives Ergonomic handle provides unique support for maximum performance Ceramic material is razor sharp- comparable to diamond Environmentally friendly material!