The original hinged training club just got even better. The Medicus Dual has a hinge mechanism that breaks down when a flaw occurs in a players swing. If the start of the swing is too quick, if the player is off plane, if the downswing is initiated with the hands, the club will break down. This instant feedback will improve mechanics, timing and tempo like never before. The new adjustable dual-hinge lets you vary the tension of the hinge, while the alignment indicator (on the hinge) provides visual feedback for path. The Medicus Dual is currently available in a driver is the latest addition to the line. Over a million amateur golfers and thousands of teaching professionals use the Medicus. Once you learn to swing the Medicus Dual without breaking it you know you are swinging in tempo and on plane. Translation: Longer, straighter shots and lower golf scores! Includes instructional DVD and manual.