With a completely blunt edge making it ideal for butterfly training and featuring very thick and heavy construction, this butterfly knife will help you learn to flip like a pro. Providing a user with seamless balance when flipping, the tool has a harmless 3.75 inch stainless steel blade in a black finish and comes complete with a locking catch to secure the butterfly in place where you need it. The blade features 4 circular cutouts to reduce weight; chain link inspired cutouts on the handle serve the same function. The reduction in weight and level of balance combine to make the perfect practicing tool to improve your butterfly skills!The Balisong, also known as a butterfly knife, fan knife is a folding pocket knife with two handles counter-rotating around the tang such that, when closed, the blade is concealed within grooves in the handles. Balisong trainers feature a special blunt and unsharpened "blade" and are legal in areas where balisongs are not. The Balisong, also known as a butterfly knife, fan knife is a folding pocket knife with two handles counter-rotating around the tang such that, when closed, the blade is concealed within grooves in the handles. Balisong trainers feature a special blunt and unsharpened "blade" and are legal in areas where balisongs are not.