ZWYOUNG wrist gyro ball, wrist enhancement ball, wrist enhancer 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. Skills for manipulating the wrist ball: It is safer to wear a special wristband. Gently press the ball with the thumbs of both hands, and then push the ball core in the direction of the arrow until the ball core cannot roll. Use the thumbs of both hands to quickly release the ball core, and firmly hold the ball with the palm to rotate. After feeling the rotation of the sphere, the wrist can freely control the rotation of the circular force. important: Do not place it vertically when starting, otherwise it will cause invalid push. Product name: wrist ball Net weight: 270 grammes Size: 2.7inx 2.7inx 2.2.5cm include: Gyro Ball, Wristband, Gyro Bag Brand: SHXJHXC Dimensions: 7.1 x 7.1 x 4.8 centimeters (0.24 kg)