The butterfly knife has a long history, originating in the Philippines and being used as a utility tool and self-defense weapon. Its design allows for quick deployment and easy concealment, making it a versatile tool. The folding Butterfly Trainer is fully made of 420 stainless steel. This butterfly training provides excellent corrosion resistance and high durability. A high-quality butterfly knife will enhance your flipping skills while every day practicing. Cool pocket butterfly. Butterfly not sharp, Training butterfly knives, Balisong not the real blade.