The swan was, more or less, invented for the military and it’s use in Iraq. However, what happened is not only did the military love the design but other military forces (England) loved it too! Needless to say its a tool that will not let you go! Opponents of this tool are hating life and will do what every you want. With four points to motivate your opponent no matter how you move your hand you are putting a point on the opponent will feel. This is a no-nonsense self defense weapons that you only deploy when you mean business! It’s just a no-nonsense tool that will REALLY help your opponent decide to do just what you want.