The Access Toolbox Edition is specially designed to fit behind most 20" - 21" over-the-rail toolboxes. Its availalbe for late model, full-size long and short box domestic trucks. Cover Rolls Up Easily Cover quickly and easily rolls up to compactly fit behind toolbox. This allows for full bed usage. Fully Operational Toolbox Cover does not interfere with operation of toolbox. It can easily be opened with the cover closed or rolled up. AutoLatch We have developed a patented system that automatically locks when closing cover. Best of all, the smooth action of the pull cord gives you an easy release when opening. Slide Lock A testimony to Agricovers meticulous attention to detail, Agricover offers additional locking protection. A simple sliding action is pushed to lock and pulled to unlock. This lock works in conjunction with a locked tailgate to give you ultimate security. Tight Bite Clamps. Eight sturdy aircraft grade aluminum clamps secure your rails to the side of your truck. Specially cut teeth maintain a superior grip giving these clamps exceptional strength. XT-Dial In our drive to make our designs better we took our patented EZ-Dial tension control system and gave it a large oversized grip. The easiest and most effective tension control system on the road just got better. Sealing Header Bar Our unique header bar has a dual purpose. It forms a tight seal between your cover and toolbox and offers flexibility during install ensuring a perfect fit. This product ships in approximately 1 days