The hitch was designed specifically for this vehicle (and tested with a properly loaded 5K lb trailer (but be aware of the 150lb tongue weight limit of the Trooper) many times before it was ever offered to anyone, just like everything else on my site) but it is not for jerking things out of the ground and certainly not by the chain hoops, LOL.
It does come with a backing plate, and if installed properly, it uses two of the existing holes already drilled in the rear frame cross piece. The hitch ships with four 1/2" Grade 8 bolts and Grade 8 Prevailing Torque lock nuts - washers (lock or otherwise) are not needed and do not offer any benefit. If the hitch is welded on after it is bolted (with no other mods) it would prevent removal of the gas skid plate or tank.