Could see that as a way to cut the number of clamps used in a panel glue-up



Could avoid the extras hired on for the caul clamping, but these might be a bit too weak for the task,
However....
When clamping frame corners, there is a use for cauls on the corners for which these might just be ideal.





Anything to reduce the clamp parts density also would be a plus



I'd rather have attachments versus buying dedicated 3-way gizmos