Miki Hisa Universal Knife Single-Edged 90mm Shirogami No. 2 Steel, Hammered Finish Sekimaga Roku Deba Knife Kinju ST Used at home as a fish-filleting knife. The shell-splitting knife was used for filleting small fish such as small horse mackerel and sand borer, and was used with the image of a short yanagiba knife. The black stains on the handle are not mold, but squid ink. I have also sharpened them with 1000-grit and 6000-grit whetstones. As for Kinju, since it is stainless steel, there is no rust. The shell-splitting knife is made of shirogami steel, so there are spots of rust. Please check the condition of the products in the images. Please understand that these are used items and consider them before purchasing. [Shell-Splitting Knife Product Specifications] ■Size: Total length approx. 205mm Blade part: Blade length approx. 90mm, Blade width 27mm (at the base), Blade thickness 3mm Handle part: Length approx. 115mm, Width 25mm, Thickness 19mm ■Weight: Approx. 65g ■Material: Blade part: Cutting edge Shirogami No. 2, Jigane Soft iron Handle part: Poplar Bolster: Plastic ■Blade shape: Single-edged (for right-handed use) ■Blade finish: Hammered finish ■Handle shape: Round handle ■Manufacturing: Made in Japan ■Remarks: Comes with a vinyl case for blade protection ■Features This is a small knife created by a small knife blacksmith who is good at fine work. It is a knife with a shape that is a miniaturized version of a yanagiba knife, also known as a shell-splitting knife or horse mackerel cutting knife, and can be used for various purposes such as fish, meat, and vegetables. Although it is a small knife, it has been properly back-hollowed, and the sharp blade provides good sharpness. It is very convenient for filleting small fish into three pieces. The cutting edge is made of Shirogami No. 2 steel, so it has good sharpness and is easy to sharpen. It is also useful outdoors, such as at fishing spots. [Sekimaga Roku Product Specifications] Size: Total length 280 x blade width 54 x handle height 21 mm Blade length 150 x blade thickness 5 mm Weight: Approx. 242 g Material: Blade: Single-layer stainless steel (blade material: high-carbon molybdenum stainless steel) (blade shape: single-edged) Bolster: Nylon (heat resistance 90℃) Handle: Laminated reinforced wood Country of origin: Japan