The CavFab Jeep TJ Rear Corner Armor is constructed of 3/16" American steel, formed with custom tooling to make these the absolute best fitting corners on the market. These require zero trimming to install and hug the body perfectly with perfectly cut provisions for your tank filler, tail gate hinges, tail lights, and license plate mount. Simply put there is not a better fitting set of corners anywhere. All mounting points are countersunk for a sleek smooth finished product.