Function: 1. RESISTANCE LEVEL: Change the position of the hook to adjust the resistance value. There are two gears that are 5LB and 8LB, you can choose the right level depending on the grip strength. 2. APPLICATION: Used for elderly finger strength recovery, arthritis, carpal tunnel, tendonitis, fracture, tendon and elbow surgery of tennis player, reduces stiffness and pain. 3. ERGONOMIC: The adjustable hand rectifier exercise device can be comfortably worn on wrists and fingers of any size, durable, suitable for finger training habits. 4. Improve flexibility: The finger strength trainer is used to improve the strength and flexibility of the wrists, fingers, and forearms, helping to regain finger flexibility. 5. GIFT FOR: It can be a gift for climbers, tennis players, guitarists, pianists, drummers and musicians, also suitable for the elderly and disabled. Specification: Item Type: Finger Exercise Device Material: silicone List of packages: 1 x Finger Exerciser