Up for discussion, is item A. Red handled, could be any brand, no markings. Is built stout, clearly a compression tool, but with that raised plunger, I don't really know what function it performs.
The only clue I can offer, is the former toolbox owner was a auto mechanic, A/C type tools, some exhaust tools, some Kent Moore suspension tools, Mac items (sockets, etc), but thats all I can offer.
Screwdriver shown for size reference.