I have had a very educated guess about the tool on the right. My Grandpa helped build the old Mississippi River bridge in Baton rouge, La. and worked at the Sharp Road Storage Site during WW2. As a carpenter he probably built a lot of forms for concrete walls, pillars, etc. The tool could have been used to tighten the rod and plates used to hold the wooden sides of the forms together. A steel rod was passed through the form. The plate or washer with a set screw was placed next to one side, against the board. On the other side a plate would slide over the rod and positioned against the board on that side. The tool would then go onto the rod and placed against that plate. The cam end would be facing outward. The threaded end would be screwed in as far as possible, and after the cam was locked onto the rod the threaded end would be run out ( unscrewed) to push the plate against the form and the set screw locked it into place. This kept the form from opening from the weight of the concrete.beekeeper said:
What are these? They belonged to my grand father. He was a carpenter.
I know what the bottom left one is, and actually used it once. Never needed it since, and that was 32 years ago (I was 2). The top left one appears to fit a hand brace. I have no clue about the one on the right. It could be a nail or screw extractor.