The Line-M-Up Pro Putt Positioning System from Green Keepers provides multiple marking options allowing you to sink more putts, hit more fairways and save strokes instantly. The Line-M-Up Pro conforms to USGA Rules and is legal in competition to help you align your putts and tee shots to improve your score. Green Keeper's Line-M-Up Pro gives you a visual guide when putting. When a good stroke is made, the line on the ball appears straight as it rolls. When poorly struck, the line appears to wobble. When a pure stroke (no wobble) with the proper speed misses the hole, you can identify a missed read to improve your green reading skills.
Posted by Jeff on 3rd Aug 2011
This is great for helping kids (or anyone else for that matter) putt accurately. I have one I use for my golf balls and my kid's golf balls. It's a good investment because as long as you don't lose the template or the sharpie, you'll be able to mark hundreds if not thousands of balls!