Down Blow Master (supervised by professional Kaori Aoyama). The Down Blow Master is a golf swing training device that naturally helps you master the essential golf skill of "down blow" and allows you to hit the ball with a hand-first motion. I purchased it and only used it a few times. There are no noticeable scratches or stains, and it is in very clean condition overall. All accessories, including the outer box and instruction manual, are included. *Please purchase only if you understand that this is a used item.