Ergonomically shaped to fit the contours of the hand, Eggsercizer¨ Resistance Hand Exerciser feels great in the hand. Ideal for fingers, hand, wrist, and forearm. With regular use, you can improve your grip strength, increase dexterity and mobility, develop motor skills, and improve circulation. The most resistance available. Difficult to squeeze which translates into excellent therapy for fingers, hands, wrists, and forearms.