They have been manufactured in the USA form CNC laser cut and formed steel that is 1/8inches thick. They have internal gussets for extra strength. The design hugs the factory frame and there is no loss of clearance or departure angle. It is formed from 3/4inch thick high strength alloy that usually also work as shackle mounts. The ends have high clearance to make sure it does not hung on rocks. They are contoured so they fit the subtle curves of the Jeep.