Hand strengthener provides your hands with better chances of uninterrupted mobility. It also reinforces coordination, and develops agility. We use our hands every single day for all kinds of activities making our hands prone to fatigue and injury. This products works as both prevention and rehabilitation for those with arthritis, rheumatoid arthritis, carpal tunnel, tendonitis, tennis elbow and those recovering from a broken wrist and tendon surgery. There are 3 tensions you can choose from. Light which is color coded pink, Medium which is color coded orange, and heavy tension which is color coded blue. Light tension is advisable for people starting out with a new hand exercise. Medium tension is for maintenance of an already strong grip and dexterity while Heavy tensions are recommended for people under strenuous hand training and activities such as mountain climbers, weight lifters, guitarists, and more. You can also choose any tension you want and it doesnt matter. BENEFITS OF A HAND STRENGTHENER Encourages strengthened grip and overall hand dexterity. Rehabilitates fatigue and injured hands. Maintains and stabilizes good hand mobility through regular use. Customizable to individual needs and progression.