These are premium quality complete control arm assemblies for saving time during installation and service. Conforming Design: Control arm assemblies designed and produced according to the original equipment manufacturers' technical requirements in order to provide optimum installation time and ensure overall body-wheel-tire balance. Aluminum Forged/Steel Casting/Sheet Metal: Materials are selected to perform in tough road conditions. Sealed Bag: Deeza control arm assemblies come inside sealed bags. This saves shelf space and provides easier stocking and shipping. Coating: Sheet metal control arms are coated with electrophoresis. This process enables the control arms exceed 480 hours of salt spray test, which equals to years of winter-snow-salt condition driving. Ball Joint: Most control arm assemblies include the accompanying ball joints. The press-fit ball joints come pre-installed. Control Arm Bushing: Polyurethane rubber prevents drumming, vibration; while the steel or aluminum forged bodies helps reduce the rattling and grinding noise. Hardware: Assemblies include the required hardware like bolts, nuts, washers, cotter pins, retaining rings (where applicable).