Fine-toned Hand Therapy Exercise Balls plus exercise chart and instructions. Keep your hands, fingers, wrists and forearms stronger while easing stiff joint pain and increasing range of movement and dexterity. Improving your grip and finger strength helps with both injury prevention and post injury rehabilitation and improves sport performance. The colour coded balls identify the firmness of each ball. The set of 3 balls contains a soft- yellow, a medium - blue and a firm - red . All balls are the same size and with their ergonomic design, they are the most suitable size to fit comfortably in your hand as you exert force. Altough firm according to colour they are soft to touch for user comfort. Fine-toned Hand Therapy Exercise Balls are portable and easy to clean with a sealable protective pack for easy storage. Great for problems like rheumatoid, arthritis, carpal tunnel rehabilitation, tendonitis, surgery recovery Perfect as a sports aid for rock climbing, crossfit, golf, ,tennis, and gymnastics. Ideal for musicians such as violin, guitar and piano players. The hand therapy balls can also relieve stress and reduce muscular tension created by work and everyday life. The complimentary exercise chart details all the necessary exercises for full use and effectiveness. LIFETIME WARRANTY!!! Premium quality - made to last a lifetime - For added peace of mind your purchase is always protected by a lifetime guarantee. If it's not one of the best quality products that you've ever had, just let us know and we'll refund you. For a risk-free purchase click "Add to Basket"