The Zimmermann Brake Kit - Rear - 138261 is a comprehensive kit of products designed to service and maintain the rear brakes of a car. It includes a variety of essential components that work together to ensure optimal brake performance and safety. The kit contains three main items: brake pads, brake rotors, and brake hardware. The brake pads are responsible for creating friction against the rotors to slow down or stop the vehicle. The brake rotors are the metal discs that the brake pads press against to create friction. The brake hardware includes various small parts such as clips, pins, and springs that are necessary for the proper functioning of the brakes. These components work together to ensure smooth and efficient braking, providing drivers with a safe and reliable driving experience.