Master Kuo G-4 Taiwan Tuna Knife - Medium Fish KnifeHighlights Designed for cutting medium sized fish with bones Can be used for separating fat layers from meats Curved blade shape for scraping fish scales Made with 3 layered laminated steel Outer layer: Stainless steel Core: Japanese high carbon SK5 steel Rockwell hardness: 60 61 Description The Master Kuo G 4 M Taiwan Tuna Knife is a versatile tool designed for cutting medium sized fish with bones. It is commonly used in traditional markets as a