The Zimmermann Brake Kit - Front - 138534 is a comprehensive kit designed for cars, containing various components to service the front brakes. It includes a set of brake pads, rotors, calipers, and hardware necessary for installation. The brake pads are responsible for creating friction and stopping the vehicle, while the rotors provide a surface for the pads to grip onto. The calipers house the brake pads and are responsible for squeezing them against the rotors to slow down or stop the vehicle. The hardware included in the kit ensures proper installation and functionality of the brake components. This kit is designed to provide all the necessary components for a complete front brake service, making it a convenient and efficient option for car maintenance.