Gyro Ball Workout Arm Strength Adjustable Grip Strength Forearm Strengthener Blue.Wrist Gyro Ball is made of high quality PC and silicone material, featuring high durability, strong enough for heavy duty exercise.The wrist ball is exercise the wrist, it can be adjusted at will. The faster the ball core rotates, the greater the power will be.The Wrist Ball is ergonomic and easily used. comfortable grip. Automatically start the design, easy to use.The forearm strengthener is great for wrist & forearm training, building up wrist strength. A great gift for family and friends.22cmx7.5cm/8.66inchx2.95inch, with a compact and portable design, take this grip strength training with you and exercise anywhere: at home, workplace, or travel.Gyro Ball Olive Wrist Ball Wrist Strengthener. Wrist Training Ball Self Starting Wrist Exerciser. Forearm Strengthener Wrist Trainer Arm Strength. Hand Gyro Ball Fitness Grip Strength Exercise. Gyroscopic Forearm Exerciser Workout Equipment. [Olive Wrist Ball]The wrist ball is exercise the wrist, it can be adjusted at will. The faster the ball core rotates, the greater the power will be. [Function]The forearm strengthener is great for wrist & forearm training, building up wrist strength. A great gift for family and friends. [Ergonomic Grip Design]The Wrist Ball is ergonomic and easily used. comfortable grip. Automatically start the design, easy to use. [Size]22cmx7.5cm/8.66inchx2.95inch, with a compact and portable design, take this grip strength training with you and exercise anywhere: at home, workplace, or travel. [High Quality Material]Wrist Gyro Ball is made of high quality PC and silicone material, featuring high durability, strong enough for heavy duty exercise.