Our 1967-72 Chevy truck hidden trailer hitch receiver hides behind the rear license plate keeping a nice clean, stock appearance. Can be used on step side and fleet side trucks. Designed to meet a class 4 rating with a 500 lb tongue and 5000 lb pull capacity. Requires drilling. Will not work leaf spring trucks or trucks with a roll pan. Flip down license plate holder available. For trucks only. Works with aluminum gas tanks. Will not work on long bed trucks without modifications. Will not fit Suburbans or Blazers