The TRW Control Arm Kit - 138099 is a comprehensive set of products designed to service and maintain a car's control arms. The kit includes various components such as ball joints, bushings, and mounting hardware, all essential for ensuring proper functioning of the control arm. It also includes a control arm itself, which is a crucial part of a car's suspension system that connects the wheel hub to the frame of the vehicle. The kit also contains a control arm shaft, which helps to support and stabilize the control arm. Additionally, the kit includes a control arm bracket, which is used to secure the control arm to the frame of the car. The kit also contains a control arm bushing, which helps to absorb shock and vibration from the road. Lastly, the kit includes a control arm ball joint, which allows for smooth movement and rotation of the control arm. This TRW Control Arm Kit - 138099 is a complete package that provides all the necessary components for maintaining and repairing a car's control arm, ensuring optimal performance and safety on the road.