Hand Grip Strengthener for Strength Training Sports Pianist Finger Exerciser Black 70lb 80lb Description: Suitable for Everyone: The finger exerciser strengthens improving strength, power , and speed in the fingers; It can undoubtedly be the best choice for Rock Climbers, musician, tennis players , office workers, and athletes, and it enhances the flexibility of fingers and wrists. Comfortable and Durable: Finger strengthener for small, and large hands, seniors, and teens but also ensures comfortable use; the resistance of the hand grip strengthener is perfect for both men and women with different strengths. Ergonomics Grip: The finger exerciser is designed with silicone material, and a nonslip surface, which strengthens grip and improves dexterity, and finger exercise rings build strength. Compact and Portable: Finger exercise is light, compact in size, and easy to carry and use anywhere. Great Gift: Finger strengthener trainer is a perfect gift choice for someone who is a sports athlete, golf player, office staffs, pianist, drummer, guitarist, pianist, and much more. Specifications: Material: Silicone Diameter 7.7cm/3.03inch The upper and lower wall thickness is 2.4cm/0.94inch the left and right wall thickness is 2cm/0.79inch Package Includes: 1 Hand Grip Strengthener