feature | 1. It enables you to correctly grasp the theory of flexion of the body during the swing. 2. Simple, fast and proficient in the up and down swing movements. 3. It can make your feet, knees, waist, shoulders, eyes and the direction of the ball reach the same level; when swinging up, the shoulders are fully twisted to 90 degrees. 4. After hitting the ball, you can feel your left elbow straightened and your shoulders fully twisted. |