If you read the description it is somewhat of an in between of a cavesson and drop noseband.
However considering drop nosebands are not designed to be tight because of the sensitive areas they sit on (the tip of the nose which can easily be broken) I am very, very skeptical. I think a Micklem bridle is way safer and more applicable. I would not put on of these "double nosebands" adjusted tightly on any horse, same with how I would never overtighten a drop noseband... it's just dangerous and stupid.
They say money doesn't buy happiness -- well happiness doesn't buy horses!