The medicus dual hinge irons are a amazing training aid that help you to improve your swing tempo and plane these irons instantly show you if you have made a mistake in your swing by bending at the hinge giving you instant feedback these irons can be adjusted as the player improves this adjustments can be made very gradually so that the golfer does not become discouraged and still continues to improve there swing these irons are available in both a 7 or a 5 iron allowing golfers to practice