Size: Please refer to the photos. Golf training equipment Power swing trainer. This golf training aid utilizes air resistance. Recommended for those struggling with distance or wanting to improve their swing. The four wings create strong resistance in the impact zone, forcing you to use your whole body, not just your arms, to swing. This helps you learn a better swing and increase distance. It's a collapsible design, so it can be stored compactly when not in use. xh865