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Safe And Durable – Made of top-quality Silicone, not easy to tear. It is WASHABLE and can be use frequently and comfortably. Fitness & Sport Enthusiasts – strengthen your wrists, improve the dexterity of your fingers and increase the strength your hands can apply while reducing fatigue. Its rally value is from 30 to 50 lb. Help balance your grip muscles and your expanding muscles. Reduce Strain & Provide Stability - Great for rheumatoid arthritis, arthritis, carpal tunnel, tendonitis, tennis elbow and are on the way to recover from a fractured or broken wrist, or when you type, text or any other activities which use your gripping muscles. Ergonomic Design - The finger strengthener is ergonomically designed and upgraded - the thumb hole expanded to 0.9’’ and the other 4 holes to 0.7’’, fits well for all hand sizes, fit for men, women, seniors, and teens. Due to its small and durable size, you can easily bring and use it anywhere. Multipurpose - The finger strengthener is perfect for improving strength, power and speed in the wrists, fingers, and forearms. It is not only the best choice for rock climbers, tennis players, athletes and musicians to enhance the flexibility of their fingers and wrists, but also very suitable for help the injured do rehabilitation training, divert attention to change some bad habits and relief stress.