This is the Blue Serrated Assisted Opening Folding Black Widow Karambit Style Knife. The blade is Surgical Steel with a thumb stud and curved blade. The blade is secured by a steel liner lock. The handle of the knife is plastic with a steel liner and ring pommel. Additional Details ------------------------------ Product description: This is the Blue Serrated Assisted Opening Folding Black Widow Karambit Style Knife. The blade is Surgical Steel with a thumb stud and curved blade. The blade is secured by a steel liner lock. The handle of the knife is plastic with a steel liner and ring pommel.