While the knife was said to be the backbone of the Filipino martial arts (FMA), the stick is its most popular weapon hence arnis-escrima is always identified with stick fighting. As a weapon, the stick is treated in varying ways among the many systems of FMA. In some schools, it is a mere training tool to teach the movements of the blade. In some FMA styles however, the stick is taught as a primary weapon. The mechanics by which to create trauma with the stick is different from that of the blade according to Dan Inosanto. In his book “The Filipino Martial Arts” he wrote, “The old Filipinos who made stick fighting an art preferred to hit the bone and preferred a stick to a blade. Instead of a clean cut, the stick left a shattered bone”