The Artec Industries Front Lower Control Arm Skids have been designed to reinforce the front Dana 30, or Dana 44.These have been crafted from 1/4" mild steel that has been CNC but and bent for precision fitment.This will protect the lower control arms from harmful impacts with large rocks, as well as tree stumps.Please note that installation of the Artec Industries Front Lower Control Arm Skids requires welding.. Please source out a professional welder, or fabrication specialist for installation.