Never hit a "chunk" or "blade" again when you train with the FlatBall(R) Training Aid. This 1/4-inch high disk is designed to help you hit a ball properly. A regular ball is 1 5/8" in diameter, giving you room for error. Since the FlatBall(R) is so thin, you can only hit it properly or else you will miss it entirely. When you hit it directly, it will travel a short distance, letting you know the FlatBall(R) has corrected your striking errors. FEATURES: FlatBall(R) golf swing training aid Aid helps eliminate "thin" and "fat" hits Does not travel far when hit properly Suitable for indoor or outdoor practice Each set comes with 6 individual aids Aid measures approximately 1/4" high 6 Pack