They are CDMs.
Or, as Christo would say, Crash Damage Multipliers.
I must say though, the upper hinge tubing on the driver's side of the Chili has seen service as a rock and tree deflector, with gouges to prove it. I wish I had had one on the passenger side a while back, where a dent is now. But my tubing is DOM and welded in place, vs. the ARB setup.
I don't like denting my rig, and *I* wheel it...