The Gripmaster Pro Edition Hand Exerciser is an extra heavy tension, large hand gripper, designed as a training aid for athletes to improve individual finger strength. Ideal for those requiring good grasping power for rock climbing, weightlifting and racket sports, daily use of the Gripmaster Pro will condition the fingers, hands, wrists and forearms. This extra heavy tension model provides 11 lbs. force through each finger, so it is recommended for strong to very strong hands. Also offering rehab opportunities, using a Gripmaster Pro will help to build strength of your individual fingers, hand and forearms. Boom! Extra Heavy Tension larger hand gripper - 11 lbs per finger for strong to very strong hands. Recommended training aid for those requiring good grasping power for rock climbing, weightlifting and racket sports.