Putting with a golf ball tells you if you made it or missed it. Putting with the Delta Putt tells you why! Get instant feedback on every putt. The Delta Putt gives you the answer to what you are doing with every stroke. The puck does not lie. The puck provides instant feedback to beginners through top rated amateurs and professionals. It is easy to use. Start with the puck centered against the end stopper. Stroke a putt and see your results instantly. Assess your stroke at amateur, Pro and Tour levels. Includes the Delta Putt puck and 4 foot mat.