first photo the top gambrel is: '33" length'
second photo is '37" length'
Gambrel is a Norman English word, meaning "a crooked or hooked stick" a grambrel is a stick or a piece of timber used to spread open and hang a animal by its hind legs. The hog is hung with a grambrel in preparation for butchering, then to bring the meat to market.
A small rope for hanging up the pig during the butchering process would be attached to the center.
These were found in an old barn in Vermont, that the same family owned for 4 generations.