(Please also consider purchasing with other products.) This is a Deba knife and a sashimi knife made by Seiko. The steel used is Gin-san steel (Yasuki Steel Silver Paper), which provides excellent sharpness and is also resistant to rust. They are offered as a set, making them a great value. Please use them at home or at work. ● Deba Knife: 12,500 yen Length: 290 mm Thickness: 7 mm Blade length: 150 mm Weight: Approximately 237 grams ● Sashimi Knife: 12,700 yen Length: 340 mm Blade length: 210 mm (Please note that there may be slight variations due to the handmade nature of the knives.) Please make your purchase with understanding. Those who are overly concerned about details should refrain from purchasing. "Gin-san steel" is a traditional stainless steel that has been widely used in the world of Japanese knives for a long time, and it is a steel material trusted by chefs even for Japanese knives that require sharpness. Hitachi Metals, which manufactures Yasuki steel such as white steel and blue steel, created silver paper steel as a rust-resistant stainless steel, and Gin-san steel is made by increasing the carbon content and increasing the hardness. It is a steel material that retains its sharpness for a long time even among stainless steels, so it is suitable for those who use it for extended periods.