Hand Exercise Rings build strength in fingers, hand, wrist and forearms. Varied activities, including crushing, pinching and extensions to improve the dexterity of both the fingers and hands. Perfect for athletes, musicians and physical therapy patients. This grip trainer makes you feel comfortable when do hand exercise. You know these hand strength grip are the right choice. You can use your hand strengthener at home, office as the rings are lightweight and easy portable. It is perfect for rock climbing, guitar playing or other activities.