Using factory control arms on lifted cars causes axle housing to rotate. This not only affects suspension articulation but also results in poor driving stability and vibrations due to altered caster and pinion angle. Adjustable arms help set axle to factory alignment spec for greater handling performance and lifespan on the propeller shaft u-joint bearings. The arms are well-known for its high strength steel tube construction to withstand harshest off-road conditions. Its innovative tapered lock nut adjuster system help secure the rod ends to the slotted thread control arms when being tightened, keeping the adjusters from coming loose due to vibration or suspension flex. It also features harden rubber bushings for better handling response over the factory components. . Correct caster & pinion angle on lifted cars . High quality ultra strong steel construction . ED coated and painted for the highest durability . Equipped with premium quality harden rubber bushings . Equipped with new tapered lock nut adjuster  Note: Adjustable - For 0~4.5" Lift Harden Rubber Equipped 2 PCS/SET  Fits: Jeep Wrangler JK 2006-2018 Jeep Wrangler unlimited JKU 2006-2018