This rally proven rear differential protector is made of lightweight T-5052 aircraft-grade aluminum, 3/16″ thick. It is formed and welded to provide ultimate protection to your rear diff. It boxes in both sides and the rear and also has an up-turned front lip to glide over rocks and debris. Weighs less than 4 pounds. Installs in minutes and comes with all hardware and instructions (bolt-on, no drilling).