Zen Strength Hand Exerciser - Grip, Forearm Wrist Strengthener - Squeeze & Flex Finger Extension Trainer Therapy Stress Ball Training, Physical Rehabilitation Relief - Women Men (Medium);

Best all-round therapy & extensor exerciser - 1) works as a hand therapy ball (light and medium tensions) for increasing strength and range of movement. 2) exercises the frequently ignored 'extensor' muscles to guard against and help relieve the symptoms of carpal tunnel, arthritis and repetitive strain injury. 3) provides basic grip training for rehabbing hands.