Power Twister Tension Bar is designed to build upper body strength i.e. arms, wrists, chest and shoulders. Exercise your chest by bending the exercise bar inwards, similar to pectoral flys, providing resistance through your entire motion. Handle Position Defines Different Resistance , When you hold the extreme handle it gives you the resistance of 30kg, if in between the two handles the bar offers 40 kg resistance and the first handle offers 50 kg resistance. Portable and easy to pack in bags and exercise in home or gym.