The Zimmermann Brake Kit - Rear - 138455 is a comprehensive set of products designed to service the rear brakes of a car. This kit includes three key components: a set of rear brake pads, a set of rear brake rotors, and a set of rear brake calipers. These parts work together to provide optimal braking performance and safety for the vehicle. The brake pads are responsible for creating friction against the rotors to slow down and stop the car, while the rotors provide a smooth surface for the pads to grip onto. The calipers house the brake pads and are responsible for applying pressure to them when the brake pedal is pressed. This kit is essential for maintaining the functionality and safety of a car's braking system.