Using silicone gripster strengthens your forearms and hands. The way to see results is with regular and consistent exercise. Thanks to its easy use, it helps you in your exercises and strengthens your forearms, wrists and hands. Who should use it? Gripster is suitable for all ages and especially for: Athletes: Suitable for athletes who play any of the following sports. Bodybuilding, basketball, swimming, soccer, wrestling, rock climbing, tennis, golf and more! Musicians: If you play guitar, piano, and violin, it's a great tool to warm up your fingers. How long should you use? 5 sets of 10 repetitions per day, it is recommended to rest 30 seconds between each set. Use a weight that you are comfortable with but still challenges you. Reduce fatigue with GRIPSTER By gripping your hand, you can easily strengthen the strength of your fingers, forearm and wrist. It is also possible to train the flexibility of each finger separately. There are 3 levels of resistance. 13-17-21 Multi-use Features Finger extension exercise is ideal for people with hand fatigue, it can help you reduce hand stiffness, improve finger function and movement, and improve finger strength.