A drive shaft is a mechanical component that transmits power from the engine to the wheels of a vehicle. It is typically a long, cylindrical rod that rotates to transfer torque, allowing the vehicle to move. Drive shafts are essential in both front-wheel and rear-wheel drive systems, connecting the transmission to the differential. In many vehicles, drive shafts are made of steel or aluminum to withstand high torque and stress. They may also include universal joints, which allow for flexibility and movement as the vehicle navigates uneven surfaces. Proper maintenance of the drive shaft is crucial for optimal vehicle performance.