Eyeline Golf Putting Professional Rail Features The Eyeline Golf Putting Professional Rail was designed especially for the needs of teachers and serious players. It is approximately 12 inches longer than the standard model. This enables you to practice a longer stroke that is truly on plane. The Professional Rail snaps onto the standard Eyeline mirror and is compatible with earlier models. By using it with the mirror you can not only feel the up and inside stroke, but you can also check that your eyes, shoulder and putter face are square and consistent. Watch the Golf Putting Professional Rail Video If you have any questions about this product or would like to order by phone, please call us Toll Free at 888 733 8383. We look forward to hearing from you!