الوصف

A drum brake is brake that uses friction caused by a set of shoes or pads that press outward against a rotating cylinder-shaped part. A metal cylinder to which pressure is applied by a braking mechanism in order to arrest rotation of the wheel or shaft to which the cylinder is attached.
There are two types of brakes used on modern cars: Disc brakes and drum brakes. All new cars have disc brakes on the front wheels, while the rear wheels may use either disc or drum brakes.