The Zimmermann Brake Kit is a comprehensive set of products designed for use on a car's front and rear brakes. It includes a variety of components to help maintain and improve the performance of the brakes. The kit contains six items, including brake pads, rotors, and hardware. The brake pads are used to create friction against the rotors, which are the metal discs that spin with the wheels and provide the stopping power. The hardware included in the kit may consist of clips, shims, or other small parts that are necessary for proper installation and function of the brakes. Overall, the Zimmermann Brake Kit is a complete package that provides all the necessary components for a complete brake upgrade or replacement.