The Zimmermann Brake Kit - Rear - 138892 is a comprehensive set of products designed to service the rear brakes of a car. The kit includes a variety of components, including brake pads, rotors, and hardware, to ensure a complete and thorough brake maintenance. The brake pads are responsible for creating friction against the rotors, which slows down the vehicle when the brake pedal is pressed. The rotors are the discs that the brake pads press against, and they are responsible for dissipating heat and providing a smooth surface for the pads to grip onto. The hardware included in the kit may consist of caliper bolts, clips, and shims, which are essential for proper installation and function of the brake components. This comprehensive kit is designed to provide all the necessary parts for a complete rear brake overhaul, ensuring optimal braking performance and safety for your vehicle.