My wife ordered these when she ordered our Body Armor rear bumper. I reviewed that elsewhere on here.
These little cages look good and seem well made. They don't come with instructions which would have been nice. I think they left out instructions because they would have had to include pictures or explain why they designed the silly things so they can't be installed.
The place you have to put a screwdriver to mount the thing in the tail light mounting holes is blocked by the guard itself. All three of the mounting points are blocked by the guard. I was able to angle a screwdriver in and get two screws in through something akin to brute force. I tried angled screwdrivers and a ratching driver to get at the third. No luck. I am still trying to figure out how to get that silly thing tightened down. I'm planning to try needle nose pliers from the side. I'll use the pliers to grab hold of the screw from the side and see how far in I can get it.
Good looking product. Lousy design. No instructions.