Strengthens grip and improves dexterity - Hand exerciser rings strengthen fingers, hands, wrists and forearms. Varied activities including squeeze, pinch and extend , improve the dexterity of fingers and hands. Perfect for athletes, musicians and physical therapy patients. Progressive Resistance Levels - Progressive resistance levels allow you to gradually increase the difficulty of each workout as your grip improves. Color-coded set includes 30lb, 40lb, 50 lbs, 60 lbs, 70 lbs, 80 lbs which can also be used for effective interval training, alternating between all three resistance levels in one workout. Durable, non-slip silicone construction - The handle reinforcements are made with premium silicone material that is odorless and latex-free. The anti-slip rings are also tear and crack resistant for long-term use. Rehabilitation and Prevention - If you have carpal tunnel, arthritis, tendonitis, tennis elbow, rheumatoid arthritis, joint pain and are recovering from a fracture or a broken wrist or tendon surgery, this is a great option for treatment.