Select utility models will get this new outside rail perimeter “built into the frame”. The purpose of this new rail is to allow the end user to place tie downs where they want them and need them most, or add more without hassle. We are in hopes that this will make surface mount D-rings a thing of the past. Since this is also the main frame of the trailer it will be a secure and safe spot to secure your load. We invite you to check out this new feature at any of our dealers.