A butterfly knife trainer is a standard balisong / butterfly knife without a Sharp blade. It is 100% legal in the UK and, unlike a real knife, you can't cut yourself. The practice butterfly knife will help you learn how to flip without getting injured but, note, you can develop bad habits if you stay on the trainer too long. For example, you can ingrain some poor flips that, with a trainer, won't hurt but, with a real balisong, will hurt a lot. I recommend you to train with a trainer until you feel confident enough to move onto the real thing-no more, no less

High Quality.  9 inches Total Length