"Stormin Mormon" fired this volley in news:ilvln1$n0r$ snipped-for-privacy@news.eternal-september.org:
It's a goat stanchion. Made to be mounted on a wood rail.
We used them for both feeding (so they don't raid one-anothers' rations), and for some milking of troublesome animals, and for medication and inspections.
Had one; home-built.
LLoyd