Just for the sake of conversation... it is very interesting to me, that no matter what search you do, Nothing seems to come up on these... Searching ASO vises,,,,, and not one even remotely looks like it... the Whole in the side should be telling of something, both have the same keyed type hole.... and neither yours or mine has any vise like faces. I thought maybe a pipefitter, wagon maker, something off the wall... But have not found anything even remotely like it... form fit or function.. hmmm