Receiver hitch rattle reducers - do these work?

A cheap and easy fix is with a large nut and bolt. Drill a hole through the receiver slightly larger than the bolt diameter then have a nut welded over it with the hole centered. Thread a bolt through it and tighten it against the shank. Problem solved. I have done this on several hitches where the bike racks would shake and wobble. Works great and costs about $1 plus a beer for the welder.