Hello; A tow truck is a truck used to move disabled, improperly parked, impounded, or otherwise indisposed motor vehicles. This may involve recovering a vehicle damaged in an accident, returning one to a drivable surface in a mishap or inclement weather, or towing or transporting one via flatbed to a repair shop or other location. There are also several sizes and weight categories of tow truck. The lightest models are usually based on light truck and van chassis offering boom and tow weights of around 5 to 10 short tons, making them ideal for car towing. Medium-duty tow trucks have a boom capacity of 15 to 20 short tons. Heavy-duty tow trucks, based on chassis used by semi-trucks, with multiple axles and the ability to tow fully-loaded semi-truck and trailer combinations, have a boom capacity from 25 to 50 short tons. Rotators are the heaviest type of tow truck, ranging from 40 to 75 short tons and often come with many other features per customer specification. Most flatbed-type vehicles are based on medium-duty and heavy-duty trucks to provide the chassis strength necessary to carry entire vehicles.