The Swing Governor™ is designed to remain between your knees during your backswing, and to slide out on the downswing. (Generates a resistance between upper & lower body on the backswing then pushes the front straight so it "posts" on the downswing to enable centrifugal acceleration) To neccesitate this, we have: angled the rear pad by 20 degrees, put dimples on the front pad for better adhesion, and included a 20mm spring to assist with the slide out. Built with sturdy aluminium and rugged plastic so it is light & strong and tested to 100,000 compressions.