products are designed to be easy to use, versatile, and easy to install. finger strengthener is made from silicone rubber, soft and comfortable, and not easy to break. We have designed 3 levels of finger trainer resistance bands according to the intensity of finger movement, and the frequency band design is 6lb-9lb-12lb. And have 3 resistance levels of hand grip ring, and the frequency band design is 30lb-40lb-50lb. Hand resistance bands are flexible, with both right and left-hand usage available. The finger exerciser is easy to use, just slide your fingers into individual loops designed to exercise and strengthen fingers, and correct imbalances on individual fingers. Strengthen finger muscles by creating resistance to expansion. They are rubbery and sturdy, which are great for building hand strength and stretching tight hand muscles. The finger extensor exerciser is portable. You can keep them in your bag or pocket, and use them anywhere at any time. Such as walking, traveling, in the office, at school, watching TV, or any place you want to exercise. The handgrip strengthener is ideal for a rock climber, guitarist, drummer, wrestler, or softball pitcher. The strength trainer extensor is also great for rheumatoid arthritis, arthritis, carpal tunnel, tendonitis, tennis elbow and are on the way to recovering from a fractured or broken wrist, or any other activities which use your gripping muscles.