The best putters in the world will admit that they try to swing the putter a little inside on the back stroke and then release the putter head down the line on the through stroke. The IDL Putting Track Set will teach you to putt like the best players in the world. Simply place the heel of your putter against the vertical portion of the track. As you make your stroke, allow the putter head to stay in contact with the IDL Stroke Putting Track. The putter head will swing a little inside, then down the line on the through stroke. It will feel effortless and the results will be remarkable!