Power take-offs (PTO) are extensions of a vehicle's drive train that can be engaged to power auxiliary equipment such as plows, augers, winches, and many other material handling, construction, and agricultural implements. Power take-offs (PTO) require special handling and safeguards because of the danger of becoming entangled in the moving shaft. PTOs are also commonly used with trucks to power auxiliary units, such as dumping or tipping mechanisms, compactors, snowplows, cranes, and lifts. A truck power auxiliary unit may also include a cement mixer, fire equipment on a fire truck, sewer cleaning trucks, and sweeper vehicles.