The Zimmermann Brake Kit - Front - 138672 is a comprehensive set of products designed for servicing the front brakes of a car. It includes four objects, each serving a specific purpose in maintaining and improving the performance of the car's braking system. The first object is a set of brake pads, which are responsible for creating friction against the rotors to slow down or stop the vehicle. The second object is a set of rotors, which are the circular discs that the brake pads press against to create friction. The third object is a set of brake calipers, which hold the brake pads and are responsible for squeezing them against the rotors. The fourth object is a set of brake sensors, which monitor the condition of the brake pads and alert the driver when they need to be replaced. This kit is designed to provide all the necessary components for a complete front brake replacement or maintenance, ensuring safe and efficient braking for the car.