Designed for long bed trucks, the AC 004 tailgate adapter lets you close the tailgate after loading your motorcycle. It clips on to the main frame of the ramp without tools. It lets you slide the motorcycle over the tailgate to load and off-load it. It is compatible with AC-001, AC-006, AC-008. Once installed, the tilt ramp can slide on top of it to clear the tailgate. Very handy if you want to drive with your tailgate closed.