Chilly, if that is a 6" - 8" and you have a 6" cresent, take the screw and adjusting nut ouit and try it in the double.
that is if you win it.
I hate to say it, but burried in one of my (caves) is a box of new old stock parts, where ???
if I remember right, there were screws, nuts & sliding jaws.
did someone mention piles & piles of "gotta haves" ??? but what and where ???
a few days ago, I ran accross a couple cards of radio finger wrenches, I went to get them the other day to take a few pictures, and I cannot find them.
I am still trying to learn how to shrink pictures to put on here, my wife did the Ellis wrenches for me.
I am not a computor savvy person, still type with one finger.
Frank