Disc Brakes refers to a braking system that uses metal blocks (discs) instead of drums. The disc brake has a flat brake shoe on both sides of the brake disc. When the oil pressure of the brake master cylinder is sent to the slave cylinder, the brake shoe is clamped to the brake disc to achieve the effect of tight braking. Disc brakes are generally used for front wheels. Some advanced cars are equipped with four-wheel disc brakes, which have the advantages of sensitive function, good heat dissipation, no need to adjust the brake clearance, and easy maintenance.