Guys,
I believe that the reference to the iron rings along with the wedge are maul rings. These are stout iron rings about 6 to 8 inches daimeter by 1/4 inch thick by 1 inch wide. These were used to reinfoirce the hitting faces of wood splitting mauls. The handle and the maul head was made from hard wood, often on the spot. Fit the rings on the faces of the head and you have a stout splitting maul (big hammer) to work with the wedges. No need to carry over the Allegheny Mountains the entire maul - just the rings!
Jim