Strengthen your grip and forearms while having fun with this LED gyroball wrist trainer. Using gyroscopic resistance, it challenges your wrists, arms, and shoulders with every spin no batteries required. Built with a durable core and light effects...
Strengthen your grip and forearms while having fun with this LED gyroball wrist trainer. Using gyroscopic resistance, it challenges your wrists, arms, and shoulders with every spin no batteries required. Built with a durable core and light effects...