Also called tire locks. 4 are shown here installed on a Cadillac and a pair of different manufacture. Yes they were intended to help keep the early soft latex rubber tire from rolling off the rim on a tight corner.  Today they are usually fakes, just the external pieces in place as the internal parts are such a bear to install and not needed with synthetic rubber and synthetic cord tires. Your box seems to probably be modern reproductions but surely someone would like to make thei