The Zimmermann Brake Kit - Rear - 138493 is a comprehensive kit of products designed for the maintenance and repair of a car's rear brakes. It includes three essential components: brake pads, rotors, and hardware. The brake pads are made of high-quality friction material and are responsible for creating the necessary friction to stop the vehicle. The rotors are the circular discs that the brake pads press against to slow down or stop the car. The hardware consists of various small parts such as clips, pins, and springs that are essential for the proper functioning of the brakes. This kit is designed to provide all the necessary components for a complete and efficient brake service for the rear wheels of a car.