The two relics in the 3rd picture with the rings in the flat pieces of iron are log dogs. They hammered the wedges into the end of logs and put a chain through the rings to tie them together. Here in Mi. they used them alot in rivers and lakes. They would make a outer ring of chained logs (dogged) with loose logs in the middle and hold them until needed. Nice finds.
wolverine.
yep its a batch of old relic iron logging equiptment - the wedge and ring thing--the wedge was pounded into the logs --so that the ring could be hitched up for dragging the logs out of the woods by ox teams