1. High-quality design for maximum performance: Our grip exercise ring and finger resistance bands are made of high-quality environmentally friendly silicone, safe and durable, washable and longer, not easy to tear. Can be used frequently and feel comfortable when you exercise your hand. 2. Fitness & Sport Enthusiasts: Good Fitness Equipment Complement,Great for rheumatoid arthritis, arthritis, carpal tunnel, tendonitis, tennis elbowand this hand grip extensor are great stress relief toys. 3. Rehabilitation and prevention:If you are fit or work with the computer, the muscles of the hands are accidentally stretched or sprained. Then you need this workout kit to recover your hands and fingers. and this workout kit is perfect for improving finger and hand strength for athletes such as rock climbers, fitness, tennis, baseball, boxing, tennis, golf and shooting and musicians such as guitarists, bassists, pianists, violinists etc. 4. Ergonomic design for all hands:The strength trainer is ergonomically shaped and fits well for all hand sizes and all ages, ideal for men, women, seniors and teenagers. Portable and lightweight, they are in any bag or bag. You can get repetitions at home, at work, while walking, in the car or anywhere at any time! 5. Fitness & Sport Enthusiasts: Both finger stretcher and hand ring have 3 levels. 3 kg / 30 lb for rehabilitation and beginners (for children and women and men), 4 kg / 40 lb for relaxation and computer workers (for women and men), 5 kg / 50 lb for grips workout and athletes (for men).