Description: 【Premium Quality】Made of high quality PP material, featuring high flexibility and durability, strong enough for heavy duty exercise. 【Ergonomic Grip Design】The powerful gripper is ergonomic and easily use. Comfortable grip, good elasticity, and non slip. 【Pocket Size】With a compact and portable design, take this grip strength training with you and exercise anywhere: at home, workplace, or travel. 【Feature】Free rotary adjusts strength, 10kg-100kg strength range. Intelligent design, automatic counting. 【Hand Training】Great for finger, wrist & forearm training, building up hand strength, increasing grip and the flexibility of fingers. Perfect for wrestlers, athletes, musician, muscle builders, exercise trainers. Specification: Material: PP Size Chart: Spring Diameter: 4mm/0.16inch Gripper: 17cmx12.6cmx2.6cm/6.69inchx4.96inchx1.02inch Package Includes: 1 Hand Grip Note: Please allow slightly errors due to manual measurement and different monitors.