These custom made hitch covers look like the end of a cartridge case, complete with head-stamp.  They are made of solid brass with a stainless steel “primer.”  The diameter of the brass is 4 inches and the engraved letters are about half an inch tall. The section that slides over the trailer hitch is aluminum, so you don’t have to worry about rust.  The mounting tube is also aluminum and fits the standard 2″ hitch receivers.