Milburns EZ-Right is a cable that has pre-measured marking installed on it to help measure and layout Athletic Fields of varying widths and lengths. It comes with simple to follow step by step instructions. When followed correctly E-Z Right saves a lot of time and energy and you don't need a rule book or a tape measure. Lining Athletic Fields becomes a breeze. We will be glad to go over the details of this product. Please free to call us TOLL FREE at 1-800-278-7473