Powerball

I gotta have one of these! What exactly is a Powerball? It's a hand-held sphere within a sphere that can provide you with hours of fun as it simultaneously gives your fingers, hands, wrists, forearms, biceps, and triceps a great workout (via its powerful gyroscopic action)! It's a wonderful tool that aids in the prevention and rehabilitation of carpal tunnel or other repetitive strain injuries affecting the wrists.