MAKE YOUR DOOR YOUR GYM- The full body resistance system slides onto any standard home, office or dorm door within seconds. ADJUST RESISTANCE POINT-The patented design allows the resistance point to move up and down the door, changing the angle of resistance to move between upper body, core, and lower body exercises. 60LB PEAK WEIGHTED RESISTANCE: 30lb weighted peak resistance per cable = 60lb total resistance. Resistance training uses resistance or force to induce muscular contraction, which builds strength and anaerobic endurance. Resistance exercises also help you increase bone density, improve metabolism and decrease your risk of injury. INDEPENDENT CABLE MOVEMENT- Each of the two resistance cables act independent of each other and can be quickly moved up and down to vary exercises KIT INCLUDES: Two 4ft Resistance Cables- R3 (30lb Each); Two Max Flex Handles; Interchangeable Ankle/Wrist Attachment; Two Door Straps with Cable Pockets LIFELINE RESISTANCE CABLES-M