Proper naming of tools avoids confusion but there may not be universal agreement on what is the proper name. Or, sometimes, I carelessly use the wrong name. A common example is saying bending fork when I actually mean a bending wrench.
Usually, when I say “bending fork” I am imagining a U-shaped tool which fits in the vise or hardy hole. Often I also call a bar with a U on the end a bending fork. Is that right? Or, is it a bending wrench or scrolling wrench?
I think of a twisting wrench as a bar-type tool with a U or multiple U slots near the middle. It might actually be an adjustable wrench with a second handle welded on the side opposite the original handle and aligned with it.
One such device is the Simonian Twisting Wrench. I got one years ago and forged out the handles for greater mechanical leverage. The wrench comes with four different size slots 1/4″, 3/8″, 1/2″, and 5/8″.
A similar tool is shown being made here - the double ended bending wrench by purgatory ironworks.
This is an elegant forging demonstration by Mark Aspery. The ABANA National Curriculum Scrolling Wrench
Other nice examples: