The Motobilt MB3019 Jeep TJ c pillar roll cage feet are laser cut from 3/16 inch thick P and O steel plate. They will help you finish out your custom roll cage in your Jeep TJ professionally. The mounting holes are slotted so that you can have some adjustment when fitting the cage to the mounting feet. They mount to the rear fenderwell of your Jeep TJ and allow you to mount your custom roll cage securely. It is recommended to use 2 plates at each mount. One on top and one on the bottom side of the fender. The mount has 2 additional holes for an even more secure mounting point. Also the plate is designed so that the tube can be mounted on the outward portion of the plate where it is curved. The mounts are sold as a pair so that you can do both sides of your Jeep TJ.