The Miyabi Birchwood Knives feature 50 layers clad on each side of an SG2 powdered steel core, creating a beautiful Damascus pattern. Each blade is hand-honed using a traditional three-step honbazuke process. The blades on each Miyabi Birchwood knife are Cryodur ice-hardened for enhanced hardness, flexibility and are corrosion resistant. Itís sharpened twice on whetstones with custom grits, followed by mirror polishing on a leather wheel. The traditional D shaped handle is made of birch burl wood, and features a mosaic pin accent with an engraved end cap. Miyabi Birchwood knives are meant to be hand-washed. Made in Japan, with a lifetime warranty.