The high-quality top ball looks very fashionable. It is not only a good toy, but also can be used for muscle training anytime and anywhere. This is also a good warm-up exercise before playing golf, basketball, rock climbing and other sports.☞☞Specification:Product Name: Wrist BallProduct shell: polycarbonate silica gelProduct core: zinc alloyProduct specifications: 70* 70*55MMSuitable for: fitness enthusiasts☞☞Packing : Wrist ball*1, Wrist strap☞☞ How to use:1. Push the thumbs of both hands in the direction of the arrow of the center of the ball until the resistance is large and the center of the ball cannot roll.2. Quickly release the core of the ball with the thumbs of both hands, and turn the ball by the hand3. After feeling the sphere rotates, swing the ball from left to right in a circle-like way to slowly rotate the wrist ball, and the speed can be increased with the inertia☞☞Service:1. If you need more styles, please click our other products to find the style you want.2. If you have any questions before or after your purchase, please do not hesitate to contact us.