The knife itself is made of high-speed steel, making it highly durable. High-speed steel (HSS) is a very hard steel material, also known as high-speed tool steel. This is a handmade item by an individual, and the design is unique and easy to use compared to general soba noodle knives. A brand mark is stamped on it as the maker's signature. Total length: 27.5cm We do not accept questions, consultations, or returns after purchase, so please ask any questions in the comments before purchasing. Instant purchase is welcome without comments.