This is the Kai Komachi Series of kitchen knives. It includes both the Pure Komachi HD, and Pure Komachi 2 collections. In the Kai Komachi knife line, the blades are made of a high-carbon stainless steel that allows the edge to maintain its durability and sharpness for longer periods of time. Additionally, each blade features a non-stick, food-safe color coating for fashionable and efficient cutting. And as each type of knife has its own unique color; this helps to prevent the accidental cross contamination of foods when preparing meals.