Grip Device Can Be Adjusted And Extended Handle Rehabilitation Training Trainin Product features: Enhance hand strength, a good helper for all kinds of sports enthusiasts. Application: ball sports enthusiasts, office workers, exercise wrist strength, sports enthusiasts. Suitable for different people. The strength of 10-60kg can be adjusted at will to meet the needs of different groups of people and different ranks. High-strength alloy springs, made of customized materials, are firm and durable. Upgraded adjustment buttons make your mastering power easier and more relaxed. Product parameters: Material: PP+TPR+Steel+Piano wire spring Size: 16*11*2CM Strength: 10-40kg The product contains: 1X Grip training device