(https://books.google.com/books?id=DTcxAQAAMAAJ )  Heavy hardware -- extensive Williams wrenches lists which include details of dimensions & weight.  (Williams is not named, but the trade mark is clear in the illustrations.)

wow, lots of information.
Papaw will have to check out page 844   figure 2757  the alligator wrench

wrench numbers 0, 1, 2,3,4, & 5

states that they hold pipe & round iron.

Cool! I like it!

thanks for sharing , neat catalog

Yes indeed, lots of good stuff to browse through there. I think I even found spare parts for my old furnace!