Putting is a huge part of any player’s score. It is also the part of the game that is easiest to improve - regardless of age, strength, or skill. Using the EyeLine Putting Alignment Mirror is instant feedback and improvement. Align it, adjust the putter face to square to the target, swing the putter through the sweet spot gate, and pick the ball out of the cup. Simple, structured, effective practice with a plan. Why do Tour players use this mirror? “It makes me better!” The Groove Mirror is the result of observing and listening to Tour players for almost 20 years. “What are your core fundamentals?” “How do you train every day?" We have taken our Tour Proven EyeLine mirrors, and added features for even more feedback and training drills. This is our greatest putting mirror ever. “Motion Detector”, “Impact Gate”, and “Ball Gate” will now be standard elements of putting. This is the exact Putting Mirror used by 16 of the Top 20 Players in the World (OWGR)! The Groove has a new, distinctive look as seen on the PGA Tour. The Shoulder Mirror gives an expanded view of the shoulder alignment. Match your shoulders to the mirror lines and you are ready for more solid, end-over-end rolls. No more cut putts. Slide the shoulder mirror against the bottom edge of the putting mirror. No attachment needed. Turn the shoulder mirror around for a great arc template, too. TOUR TESTED, TEACHER APPROVED & PLAYER PROVEN. Made in the USA. It's TOUR TESTED, TEACHER APPROVED & PLAYER PROVEN