Accu Stroke Putting Training Aid Accu Stroke is an advanced muscle memory system designed to groove the golfer's putting stroke. The side of the heavy, cast Polyethylene bar is sloped to exactly 17 percent, the perfect angle for the putter shaft to be in for a correct putting stroke. The golfer learns the feel of the stroke in both directions, backward, then forward. It takes the guesswork out of the follow through, making precision straight shots on every putt. You will learn the science of correct putting and soon be able to repeat it on the greens every time. A DVD instructional video is included.