Kasumi knives are made using the traditional Japanese technique of sword making. The main cutting edge of a KASUMI knife is made of V-Gold No. 10 carbon stainless steel that has been developed especially for knives. The blades are hardened to Rockwell C59 - 60 degrees, and therefore keep a sharper cutting edge longer than most other knives. The KASUMI damascus pattern you see on both sides of the knives is the result of repeated folding and forging of fine stainless steel into multiple layers. These prestigious knives would make the ideal special gift for a chef or serious cook. Please note that our knives are not for sale to persons under the age of 18. By placing an order for this product, you declare that you are 18 years of age or over. This item must be used responsibly and appropriately.