Gyroball-Wrist Power Gyroscopic BallGive yourself a more challenging workout! Working out and getting in shape is a great way of becoming fit and healthy. Add a challenge to your daily workout with PowerForce Gyroball! It is a gyroscopic ball that is designed to act as a hand trainer fitness equipment that is isotonic, so your body can improve and enhance more muscles without the effort of lifting weights. Features: High Quality It is made with premium silicone rubber and aluminum alloy