This Swing Plane aid is an australian design. It is designed for both right and left-handed players. It allows you to observe what your swing plane is doing from shoulder height on your back swing to shoulder height on your follow through. It will help you to identify swing problems and to make corrections where needed. The Golf Swing Plane Aid will help all players from social and club players to professionals. The Golf Swing Plane Aid comes with a full set of instructions on the packaging showing you how to use the aid to improve your swing plane. Note: The Golf Swing Plane Aid will fit all regular shafts.