MAIN FUNCTION: Trailer locks ball hitch covers key slot prevents dust and corrosion in the locking mechanism, keeping vehicle and trailer connected and helps prevent theft of the hitch. : Tow ball lock is made of premium zinc-alloy material, easy to install with coming four components, including the lock and keys.. HOW IT WORK: Lock for trailer hitch expands and locks inside the coupling of your trailer preventing the trailer from being connected to a tow ball..
