Teaches the correct wrist position during your newly acquired slower backswing. Patented internal slide weight lets you know if you are releasing the clubhead early or just at the right time. Instant feedback and repetition teaches (1) a slow deliberate backswing, (2) correct cocking of the wrists and (3) the correct releasing of the hands and clubhead on the downswing. Use in your home, office or on the golf course. It's "Practice away from Practice". Creates brain/muscle memory of the correct swing techniques.