The brake disc is an important part of a car's braking system; it is a round disk that is attached to the wheels and will rotate together when the vehicle is in motion. When the driver presses the brake pedal, the brake caliper clamps down on the disc, creating braking force through friction to slow or stop the vehicle. Brake discs are usually made of a strong metal material, such as cast iron or steel, which helps improve braking effectiveness and makes them easier to maintain than drum brakes.
