These are Evo Manufacturing JK Rear lower Control Arm Skids. These are fabricated out of 3/16 inch steel, and are CNC bent. The Job of these lower rear control arm skids are to protect your links. Because the links hang so low, they are exposed to a lot of danger especially under articulation. So if you're going over tree stumps or large rocks, you risk damaging critical suspension components. The Evo Lower Control Arm Skids offer more protection, and reinforce the lower control arms so they can handle a potential impact while reducing the risk of damage.
This is a complete kit, and installation from a professional welder, or a fabrication specialist is required.