Currently used by professional tour players and endorsed by golf analyst Jerry Foltz, this is the putting trainer that uses a laser to show you when your putter is aligned optimally. An L-shaped mirror that attaches to the toe of your putter reflects a laser beam generated from a module that sits opposite the mirror. The module's display shows three bars; when your putter's blade is perfectly square and level with the ground at the moment of impact, the trainer's window will display a red dot at the mid-point of the middle bar to indicate optimal alignment. Open or closed putter faces will match the beam with the outer lines, indicating poor alignment. Regular use with or without a golf ball helps to fine tune muscle memory for improved putting. Requires two AAA batteries and your preferred putter. (3 1/4 oz.)