The second weapon set, Bart Cham Dao (Eight Slashing Knives), clearly dates to a time when Kung Fu skills were a matter of life and death. Despite popular belief, open hand fighting is practically useless against a skilled, armed warrior. The Bart Cham Dao is also known as the Butterfly Knives Form because of the appearance of the blades when crossed. The form is in eight sections demonstrating various defensive and attacking maneuvers. The eight sections teach Wing Chun practitioners to tackle eight different types of weapons. The knives are used as an extension of the hands, so that many common Wing Chun techniques are performed with knives. The aim is to attack the opponent’s weapons hand first. The prong on the guard can be used to trap a weapon.