The unique feature of these knives is the Jigane, which is made by repeatedly folding together two layers of different types of stainless steel. The pattern is clearly visible and excitingly beautiful. This unique process creates a stainless Jigane with 16 exceedingly thin layers. The Jigane is the forge welded to both sides of a cobalt steel core. The addition of Cobalt and Manganese to the HIGH CARBON core greatly increases the durability and ease of sharpening. These knives are perfect for restaurant and heavy home use.