To properly install and use our patented easy loader rail system, you will need to attach two 2x4s to our rails to function as bunks and to protect the logs on your pontoon boat from scratching. We offer carpeted bunks as an “add-on”. This item also ships free. Carpet is already attached to the 2×4’s and add-on kit comes with the carriage bolts pre-installed. Note the image shows the bunks attached to the rail kit for illustration purposes only. The rail kit is sold separately. If you order this item, you will only receive the carpeted bunks, which are specifically designed to work with our patented product.