A tow hitch is an extension of a vehicle’s chassis that enables the vehicle to tow a trailer. A receiver attaches to the hitch to insert a ball mount. After a trailer ball is screwed into the mount, a coupler, extending from the trailer, hooks onto the ball. Once all the components are locked together, including chains (and sometimes wiring), the vehicle can drive and pull a trailer behind it.
See also car hitch, GCWR (Gross Combined Weight Rating), GVWR (Gross Vehicle Weight Rating), towing capacity, trailer towing technologies