The Zimmermann Brake Kit - Front - 138562 is a comprehensive set of products designed to service the front brakes of a car. It includes three essential components: two front brake rotors, two front brake pads, and one front brake pad wear sensor. These products work together to ensure optimal performance and safety of the vehicle's braking system. The brake rotors are the discs that the brake pads press against to slow down and stop the car. The brake pads are the friction materials that make contact with the rotors to create the necessary friction for braking. The brake pad wear sensor is a small electronic device that alerts the driver when the brake pads are worn and need to be replaced. Together, these products make up a complete front brake kit that can help maintain the effectiveness and reliability of a car's braking system.