Size:7'' (180mm) & No Saya Knife Features → Blade Material: High Carbon Blue Steel #2 →Edge Angle: Double Edged →Grade: Kurouchi →Handle Shape: D-Shape →Handle Material: Rosewood →HRC:62-63 →Knife Style: Santoku Multipurpose Knife →Saya Cover: Optional Lacquered Magnolia Saya Knife Cover →Stain Resistant: No Our handmade Yoshihiro Kurouchi Series are unparalleled in their performance. The Black Forged 'Kurouchi' finish consists of the carbonized coating created during heat treating and provides for a characteristic look and a rustic aesthetic to the blade. Blue High Carbon Steel with a hardness on the Rockwell scale of 62-63 is prized for its high edge retention. It is sandwiched in between carbon steel in the traditional Warikomi style to add to its durability and ease sharpening. The most versatile and one of the most popular knives that a cook can have today is a Japanese all-purpose chefs knife known as a Santoku knife. Santoku is Japanese for three virtues referring to the shape of the blade which comprises aspects of the traditional vegetable knife,Usuba,and Gyuto in one knife making it a favorite among chefs and cooks everywhere. Proudly made in Japan and not mass produced. This knife is complimented with a traditional Japanese Wa-style handcrafted D-Shaped Handle that is lightweight and ergonomically welds to the hand for seamless use. An optional and recommended protective wooden sheath called a Saya can be purchased together,which protects the knife and adds to its appearance when not in use. Traditional Japanese knife making values a sharp edge,which requires attention and care. Sharpening and honing should be done with only water whetstones. Hand wash and dry only,and do so immediately if working with acidic ingredients. Do not use on objects such as bones,nutshells,and frozen foods. Carbon steel can oxidize if not properly maintained. Keep dry and oil regularly to prevent oxidation.