When you try to guide the ball, moving your club down the target line, you invariably end up with an open clubface. You have to let the handle stay low and work around the corner. This is what squares the face of your club to deliver long straight drives.
The Tour Striker Impact Strap forces you to maintain the angle between your arm and the club, which forces you to stay in your side bend and rotate to hit the golf ball. This is the feeling of the handle working around the corner to square the face. Try to get to a point where you don’t feel like you’re working against the Impact Strap and then alternate shots between having the Impact Strap tight then loose, working to recreate the same feeling with and without the help of the Impact Strap.