Many tour players are using this awesome mirror as an accurate and instant feedback device to their posture alignment setup.
This awesome Putting Alignment Mirror Training Kit enables you to check and ensure a proper setup instantly and accurately. It addresses the critical fundamental of what you need to do to be a consistent putter. Consistently practice with the mirror will definitely improve your posture, putting skill and make you knocking in those 5 & 6 footers with full confidence.
Setup and align the mirror to your target line, you can see your eyes and shoulders in the mirror. Set down your putter on the red line behind the ball, once your eyes are over/parallel with the black line, you know your shoulders and your putter face are squared to the target and you are ready to pull the shot.