The Zimmermann Brake Kit - Rear - 138775 is a comprehensive kit of products designed for the rear brakes of a car. It includes four different components, each specifically chosen to enhance the performance and safety of the vehicle's braking system. The kit includes a set of brake pads, which are crucial for providing the friction needed to slow down and stop the car. It also contains a set of brake rotors, which work in conjunction with the pads to create the necessary friction for braking. Additionally, the kit includes a set of brake calipers, which are responsible for holding the brake pads in place and applying pressure to the rotors. Finally, the kit includes a set of brake sensors, which monitor the condition of the brakes and alert the driver when they need to be replaced. This comprehensive kit is essential for maintaining the braking system of a car and ensuring safe and efficient operation.