Heavy duty steel alloy and spherical bearing instead of rubber bushing for durability. Allows camber / toe angle adjustment when lowering your car. Power coat for anti-corrosion finish. Adjustment range: +/- 3 degree. 30% lighter but still stronger than stock arms (30mm thick). Works great for lowered cars / wider tires / wider wheels. Professional installation is highly recommended. Designed for intended vehicle, this kit will help your lowered car not only drive better, but your tires will have longer lifespan as well.