Increase wrist, arm, and shoulder strength through regular workouts with EightWave - Chest Expander & Wrist Strengthener Power Twister. Equipped with a tough and durable spring, EightWave provides great resistance to help you develop all types of upper body muscles.Easy to Use - Unlike traditional exercise equipment, the EightWave is extremely easy to use. It requires NO complex process, additional tools, or even electricity in order for you to start working out.For Any User - Whether you are a beginner or a pro, this EightWave has different levels of resistance and intensities that are suitable for you. It is available in 5kg, 10kg, 15kg, 20kg, and 30kg, so you can select the intensity of your workout according to your needs.Portable Build - Our EightWave comes with a carrying bag for easy transportation. This allows you to do your workout routine not only at home but also outdoors.Ergonomic Design - The handle of this is covered with dense foam, making it pleasant and comfortable to hold. With its ergonomic design, you wont strain your wrists even if youre using it for an extended period of time.