Available in 7', 9' and 13' lengths, these golf training aids help you quickly improve your putt. Six separate devices deliver quick, positive feedback when you take a stroke. The String Guide marks a path to the hole, while the Ball-Marking Tool aids in your alignment. Maintain squareness at impact while emphasizing acceleration with the Stroke Groover Block, and learn proper head and body position by using the alignment Hash Mark. You can also create subtle breaks with the Contour Mats and learn to aim for the center cup with the Cup-Reducing Ring. Perfect for both left and right hand golfers. Made in the USA.