Line-M-Up™ is a ball mask/stencil that snaps onto your ball, so you can draw a perfect line around the ball. During the takeaway of the putting stroke, the line is a great visual tool to see if your putter is on the proper path. Line-M-Up also aids in aligning tee shots, determining point of contact, and identifying your ball.
Conforms to USGA Rules and is legal in competition to help you align your putts and tee shots to improve your score.
If this isn't the product that's right for you, check these out: J&M Original Red Shag Bag, Long Shot Impact Recorders, Medicus 2000 Dual Swing Trainer
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