I gotta confess, I have no idea what it is either. It was asked on another forum years ago and no one has come up with proof of what it is.
I do not have this tool.
In 2014 it was on a different website asking what it was.
It seems they have stumped everyone there. According to the OP the tool is 5 inches tall, 3.5 wide, cast aluminum and about 4 oz in weight. That is all the information I have.