Description: 【Premium Material】Hand grip strengthener is made from high quality steel, featuring high flexibility and durability, strong enough for heavy duty exercise. 【Ergonomic Grip Design】The powerful hand gripper is ergonomic and easy to use. Ergonomic lines on the surface ensure the safety of training. 【Portable Pocket Size】Grips strength exerciser with a compact design, you can take this grip strength training with you and exercise anywhere: at home, workplace, or even on travel. 【Hand Training】hand gripper is great for finger, wrist & forearm training, building up hand strength and increasing hand strength, improving grip, and the flexibility of fingers. 【Applicable People】Wrestlers, athletes, musician, muscle builders, and exercise trainers, whether they are beginners or professionals, this grip exerciser is the best choice. Specification: Material: Steel Size Chart: 13.4cmx10.4cm/5.28inchx4.09inch Package Includes: 1 Hand Grip Strengthener, 2 Sponge Sleeve Note: Please allow slightly errors due to manual measurement and different monitors.