The all new Practice T with mirror is the perfect practice tool for setup. The sliding rails keep your feet aimed at the target and allow you to check your ball position. The mirror slides on the top rail and allows you to see if your shoulders are square and if your eyes head and hips are properly positioned. It conveniently folds to fit in your bag. Check Your Shoulder Alignment ? Using the Practice T mirror you are able to see if your shoulders are square to the target line.? The mirror slides up and down the rail so it has the proper placement for any club from driver to wedge. ? Proper shoulder alignment is the key to straighter and consistent ball flight.