The TRW Control Arm Kit - 138094 is a comprehensive set of products designed to service and maintain a car's control arms. Control arms are an essential part of a vehicle's suspension system, responsible for connecting the wheels to the chassis and allowing for smooth and stable movement. This kit includes four different components, each essential for ensuring the proper functioning of the control arms. These components include a control arm bushing, a control arm ball joint, a control arm bolt, and a control arm nut. The control arm bushing is a rubber or polyurethane piece that helps to absorb shock and vibrations, while the control arm ball joint allows for movement and flexibility. The control arm bolt and nut are responsible for securing the control arm to the chassis and ensuring stability. This kit is a convenient and cost-effective solution for maintaining and repairing a car's control arms, ensuring optimal performance and safety on the road.