The Zimmermann Brake Kit - Front - 138857 is a comprehensive kit of products designed to service the brakes on a car. It includes three main components: a set of front brake pads, a set of front brake rotors, and a set of front brake wear sensors. These components work together to ensure efficient and safe braking for the vehicle. The brake pads provide the friction needed to slow down or stop the car, while the rotors provide a surface for the pads to grip onto. The wear sensors are designed to alert the driver when the brake pads are getting worn out and need to be replaced. This kit is specifically designed for the front brakes of a car and is a convenient and cost-effective solution for maintaining the braking system.