Ultra-light knife in Z40C13 stainless steel, black titanium coating. Secure liner lock system. Belt clip. Tortoiseshell handle. The tortoiseshell that adorns our Deejo knives is composed of a cellulose acetate composite mainly used by the eyewear industry. For decades, this synthetic material has replaced real tortoiseshell. Sturdy and luminous, a material of choice to emphasize the elegance of our knives.