Simply attach the four heavy duty resistance stretch bands to the corner posts of any boxing ring or existing four poles in the gym or training area & instantly create an ideal way to perfect punching, working off angles, slipping, ducking, bobbing, weaving, head movement & nearly every aspect of your offensive & defensive game. The line of the resistance bands enhances your footwork, both side to side & forward back. Combined with the action of the air filled centre target ball, it forces you to think & react both offensively & defensively, honing & improving all your boxing skills to be an all around better fighter.