In the simplest terms, the humble trailer hitch allows a vehicle to pull something behind it without having the item permanently attached. By disconnecting the hitch, one can remove a cement mixer, brush shredder, trailer, RV or anything else that can be pulled by a vehicle.There are different types of trailer hitches available, each with its own load rating and specific use. A load rating is how much weight the hitch can safely handle. It is essential that the tow vehicle's GVWR (Gross Vehicle Weight Rating) be able to handle the weight of the tow object. If not, the tow vehicle's engine will burn out, or the vehicle will have great difficulty in trying to stop once it is moving.The Ball HitchThe most common hitch is a ball hitch. Just as the name describes, the hitch fits over a ball- shaped fitting on the back of the tow vehicle bumper. Clamps inside the hitch close around the ball, making a secure connection.Different sizes of balls exist for different trailers, so the user must match the hitch size to the ball. It is the only safe way to connect the two vehicles.The Goose NeckShaped like a goose's neck, this is commonly found on farm trailers. A shaft protrudes down from an overhead extension at the front of the trailer (forming the goose's neck), and clamps onto a ball mounted in the tow truck's bed. Sometimes these balls are attached to special framework attached to the truck, and sometimes they are attached to the frame.It is said the gooseneck configuration aids in the tow vehicle's ability to steer. It is more likely the driver's ability to handle the truck and trailer which makes the trip safe.The Fifth WheelThe fifth wheel is a nickname for a hitch that comes down into the bed of the tow truck. A circular pin comes down from the goose neck, where the hitch (attached to the bed of the truck) clamps onto it. These are commonly found in RV's, and users report that turning, backing and driving is much easier with a fifth wheel than other types of trailers.