Power Wrist Ball Metal Gyro Ball AUTO Start Wrist Exercises Force Ball Gyroscope Ball Wrist and Forearm Exerciser Arm Strengthener for Stronger Muscle and Bones

【AUTO START】This new model start with internal pre-tensioner,no starter cords required.Just push to the inner ball and move your thumbs along the arrows direction to start,which make it more convenient.
【strengthen your wrist and forearm】Thanks for gyroscope force, this small ball can generate huge power and do more workout than you think it could be for your forearm.This gyro ball correspond to 50 dumbbells of different weights.Control the speed and power with your hand, 10,000 rotational speed per minute could generate about 35 lb weight.
【rehab your forearm and enhance your finger strength】Carpal tunnel, and repetitive stress injuries are common occurrences when you spend prolonged hours on the computer. By ensuring continuous growth in muscles and flexibility in the forearms and wrists, you can see marked improvements in muscular strength, flexibility, and blood pump.