Trusted by tour professionals, the EyeLine Putting Laser+™ gives instant feedback on your stroke path, creating vivid visual images for recall.  After just a few putting strokes, you will easily see the perfect stroke with your eyes closed.  Just snap the Putting Laser+ on the front of the putter shaft with a twist of your wrist.  The laser fires down two lines:  A line pointing to the target, perpendicular to the putter face.  With a good stroke, this line will always move on the target line.  The second line is along the face of the putter and square to the target line, showing you the proper position of the putter face throughout the stroke.  The Putting Laser+ training aid can be used indoors, at home, the office, or on the road.  It can also be used with our without a ball.  Comes complete in a small, sleek black case that easily fits into your pocket or golf bag.  Extra batteries included.