The **disc brake** is an essential component of a vehicle's braking system. Its main function is to reduce speed or stop the vehicle safely. To achieve this, a mechanism is used that includes **brake shoes or pads**.

- **Brake shoes or pads**: These are the fixed surfaces of the disc brake. These parts are responsible for generating friction when they come into contact with other elements of the braking system, allowing the vehicle's wheels to stop. When the brake pedal is pressed, a force is transmitted through the brake fluid that activates the shoes or pads, thus stopping the movement of the wheels.

- It is important to ensure that the **pads or shoes are not worn out** and are well secured, as their proper functioning is crucial for the vehicle's safety.

Therefore, the shoes or pads are the fixed surfaces of the disc brake, and their proper maintenance is vital to ensure safe and effective braking.