Blue Ox BX88255 KarGard II Deflector Please note: This will not work with the Blue Ox Acclaim, Avail tow bars or with Auto Stop braking systems. Simple Installation: Attaches to triple-lug bolts where Blue Ox motor home mounted tow bar connects to base plate on towed vehicle. The polypropylene screen stretches from bumper to bumper to prevent rocks, dirt and mud from flying onto your towed vehicle. The gas spring provides clearance for the RV's rear bumper when turning. Compact Storage - screen rolls up and secures next to the bumper.