Features： 1、NON SLIP: Surface is designed with non lip tire texture to ensure a stable grip and non slip. Ring design fits the palm, ergonomic design, balanced force, comfortable grip. 2、RECOMMENDED USERS: 70?80LB, about 32KG?36KG, incremental training, suitable for advanced grip lift, used by high strength of the hand or professional athletes. 3、GRIP STRENGTH TRAINING: Double strength in one ring, free switching, meet multiple training needs. Hand exercise ring helps build strength in fingers, hands, wrist and forearms. 4、SOFT SILICONE: Hand grip strengthener ring adopts silicone material, safe and odorless, soft and skin friendly, flexible and wea resistant, durable for use. 5、PORTABLE DESIGN: Waterproof and easy to clean, simply rinse surface stains. Compact and lightweight, easy to carry, suitable for office, travel, gymnasium, etc. Specification： Item Type: Grip Exercise Ring Material: Silicone Color: Black Use: Grip trainer for adults, physical treatment ring for hand spasms, arthritis and stroke, stress relief ring for mobile phone and computer enthusiasts, squeeze ring for people with ADHD Product Resistance Level: Approx. 32KG-36KG / 70-80LB, suitable for men advanced grip lift, high hand strength or professional athletes Package List： 1 x Grip Strengthener Ring