Auto-Start Wrist Power Gyro Ball, Wrist Strengthener and Forearm Exerciser

The device consists of a free-spinning internal rotor enclosed in a sphere. By holding the ball and making a circular or figure-8 motion with your wrist, you accelerate the rotor, which generates a strong gyroscopic resistance (force). The faster you spin it, the more resistance it creates, allowing you to control the intensity of the workout.