Authentically Japanese in design, each knife features 101 layers of steel50 layers clad on each side of the Cryodur-hardened SG2 microcarbide steel coreforming a delicate Damascus pattern with a Rockwell hardness of 63. brbrEach blade in the Birchwood collection is hand-honed using a traditional three-step emhonbazuke/em process. Its sharpened twice on whetstones with custom grits, followed by mirror polishing on a leather wheel. brbrThe genuine emhamon /emedgea visible line where flexible outer layers and incredibly hard core layer meetis reminiscent of legendary Japanese swords. A emhamon /emedge is a sign of superior craftsmanship. brbrThe D-shape of the natural Masur birch handle creates a comfortable grip and ensures tireless cutting, even with frequent use. Handle features an intricate mosaic center pin, red detailing, and engraved endcap. brbrThe chefs knife is the kitchen workhorse, letting you chop, dice, mince, and slice meat and vegetables in large quantities. Available in a variety of blade sizes to meet your needs. Hand wash. Sharpen with Miyabi sharpening stones. Limited lifetime warranty. Made in Japan. Catalog, website and select stores.