The Lifeline Power Punch works by providing variable resistance to upper body fighting movements. The premium cables provide instant variable resistance (you can't move faster than they can) which makes them the ideal tool for developing speed, power and endurance. The adjustable system allows you to add or reduce resistance so you can't outgrow the Power Punch. The handles are also designed for pushups, which is a full body exercise when you throw 80 pounds of resistance into the mix. Power Punch comes with: - 2 30" 30lb resistance cables (60lbs total) - 2 30" 40lb resistance cables (80lbs total) - 2 PowR Handles - 1 padded back strap with 4 cable pockets - 1 FREE door pull-up upgrade kit