Smaller tool post measures 7/16" in width. Larger toolpost measures 1/2" in width.
The five tool holders are Armstrong, Walton, not marked, Armstrong and Williams. The small Armstrong appears to have a broken cutter. The carbide cutter is marked KT-J4071-32
I can message higher resolution pictures if you need to see more details.
The entire lot is $75, which includes flat rate priority mail to the lower 48 states. Message me an offer if my pricing seems to be out of range.
Stan