Mainly for cutting vegetables, they are for general house hold use. Item Condition : Brand New Brand : Kanetsune Model : 2000 Series Type : Nakiri Knife Total length : 290mm (11.4") Blade length : 165mm (6.5") (160mm (6.3")) Blade width : 47mm (1.8") Blade thickness : 1.9mm (0.08") Net weight : About 185g HRC : 59 or more Material Blade : Takefu Shiro 2 High carbon steel core / SUS410 Stainless steel Handle : Plywood w / Stainless bolster Hon-Warikomi, clad blades made of Takefu Shiro-2 High carbon steel cutting core, sandwiched between SUS410 stainless steel which provides excellent edge retention, HRC 59 or more. Carbon steel blades are sharp and retain their sharpness for a long time, but can easily rust. Professional chefs and cooks prefer to carbon steel blades. They are recommended for people looking for a sharp knife and who are willing to spend some extra time on maintenance. Please make sure you wipe water out and store it. Made in SEKI JAPAN