There's not a better way to check your true putter face alignment!
The Greens Professor is a putting alignment training aid used by professionals and tour players to perfect their alignment at address and impact.
Using laser technology, the Greens Professor provides immediate feedback if your putter face is open, closed, or square to the intended aim-line. A laser light shines out of the unit and reflects off a mirror that the user attaches to the toe of the putter. The alignment is indicated by a bright red dot that is visible in the alignment viewing window. One of the best features is it is easy to see if the putter face is open, square, or closed as you stroke through impact. It couldn't be easier!
Practicing regularly with the Greens Professor will develop the proper muscle memory to help you set up properly to the ball and sink more putts!