The Refiner is an adjustable, hinged colf club that is designed to break when you exhibit poor swing mechanics, such as a jerky take away, or an over-the-top move. In this, its similar to the Medicus, which purports to do the same thing.
I’m starting to develop a theory about the golf swing based on all of the different swing trainers currently on the market. Here it is: there is really only one swing fault: the over-the-top move. Look at all the trainers that are really designed to fix this problem—everything from the Inside Approach to the Swing Jacket, to the Refiner.
More on this theory later.