Gyro Ball for Strengthen Arms and Muscles

Automatic start design, need to push the core in the direction of the arrow, start by the internal spring, very easy and convenient.The convenient design can be carried anywhere, whether in the office, gym or at home, it can be used as a toy to decompress at any time, and it can also exercise arm muscles.Wrist ball can promote blood circulation and increase the strength of fingers, wrists, hands, forearms, biceps, triceps and ligaments and shoulders, and restore muscle strength.