The Lifeline TNT Cable System is proven to be better than weights for developing size, strength and power. Work your arms and shoulders with uppercuts, bicep curls and frontal raises. Then, build your lower body strength with lunges and squat presses. Our door attachment and belt (sold separately) can expand your fitness routine with lunges, hamstring extensions, ab exercises, resistance running and more. Need to modify the intensity of your workouts? You can easily vary the number of cables used-or switch them out with a new set. TNT Cable System comes with: �Three 5 ft. cables (30lbs. peak resistance each) �Two 3-in-1 ergonomically designed Triple Grip handles �One Heavy-Duty Door Anchor �One instructional DVD with brochure