The Zimmermann Brake Kit - Rear - 138844 is a comprehensive kit of products designed for use on a car's rear brakes. It includes three different components, each with a specific function in maintaining and improving the performance of a vehicle's braking system. These components are not limited to a specific brand and can be used on various makes and models of cars. The kit includes a set of brake pads, which are responsible for creating the friction needed to slow down or stop a vehicle. It also includes a set of brake rotors, which are the metal discs that the brake pads press against to create the necessary friction. Lastly, the kit includes a set of brake calipers, which are the components that hold the brake pads and apply pressure to the rotors to slow down the vehicle. This kit is essential for maintaining the safety and functionality of a car's braking system and is suitable for use on the rear brakes of most vehicles.