The Wing Clip is a swing training tool created to curb the tendency of bending the lead arm. The Wing Clip attaches to the lead arm with 3 Velcro straps. The device fits on the inside of the arm and locks the elbow down with a 1-inch middle strap. The middle strap is secured, while the arm is straightened, covering the knuckle of the elbow. You will notice a slight dip in the contour of the middle of The Wing Clip. This indenture fits comfortably in the underside of the arm.