IRON GLOVES Sport Gripp II Hand Exerciser America's Best Hand Exerciser, Muscle Strengthener, and Stress Reliever all combined into a Squeezable Ball The GRIPP Ball develops muscles and endurance in your fingers, hand, wrist and forearm Ideal as a stress reliever while on the phone, at work, or driving The ultimate exercise for fingers, hand, wrist, and forearm. Patented design fits regular and oversized irons Safe and non-toxic Ideal for relieving stress 100% satisfaction guarantee