If you are a professional boxer, extreme athlete, or need to build upper body strength, this is a unique and challenging exercise. With progressive exercises, it can be a good way to increase explosive power, boxing speed and help break through bottlenecks.Benifits：1.Adjustable resistance to meet the needs of all types of people. 2.Stainless steel material, electroplating process, durable. 3. Adjust the resistance to change the weight. 4.Excellent grip and easy to carry.