【Adjustable Finger Exerciser and Hand Strengthener】Change the positions of the hook to adjust the resistance value, 6 levels of resistance( Heavy Black: 13 lbs, 17 lbs, 21 lbs, and Light Grey: 6.6 lbs, 8.8 lbs, 11 lbs), Suitable from beginner to adva 【Physical Therapy & Rehabilitation】Hand workout equipment for arthritis, stroke rehab, carpal tunnel, tenosynovitis, fractured, tendon surgery, and tennis elbow, reduce stiffness and pain. 【Athletes & Musical Instruments】The grip strength trainer kit works for improving power and flexibility in the wrists, fingers, and forearms. Gifts for rock climbers, Tennis players, Guitar, Piano, Drummers & Musicians. 【Durable & Ergonomic Design】Adjustable hand extensor exerciser can be worn comfortably by any size wrists and fingers, Suitable for finger workout habits. Suitable for Teens and adults. 【💯 EXCELLENT CUSTOMER SERVICE】Your customer experience and satisfaction with our product are extremely important to us. If for any reason you have any issues, please reach out to us so we can solve them immediately.