Made from interlocking 3/32" 6061 T6 aluminum to form a strong shell around the truck. Strong enough to support a full grown adult. It protects the engine, fuel tank and radio equipment, and supports the body from inside. Reduces chassis flex for better handling and longer gear life. Maintains full access to fuel filler and radio boxes. Easy to install; requires drilling one new hole in the chassis and only minor body mods. Adds less than 8 ounces to the truck.