Types of Brake
A set of drum brake consists of a drum, which is a round, metal disk attached to the axle-nut of the wheel and rotated together with the wheel; and the brake shoe that consists of brake pad, brake setting mechanism, return spring and wheel cylinder. Brake fluid tube is connected to the wheel cylinder, in order to press the brake pad against the drum to create friction, and hence, resistance.
Disc Brake is considered standard brake equipment mostly used in older car models. Now that disk brake is becoming more popular, the disk brake system can be found in the front wheels while drum brake system is applied to the back wheels. Disk brake system for all 4 wheels can also be seen today. However, the system selected actually depends on the system designed by each car manufacturer, for the purpose of highest efficiency of each car model.