I was looking through an Alcatraz Escape magazine and an inmate made this tool to spread the bars to escape.
He must have been a T owner, it looks amazingly like a Spoke Jack !
I have a set of two spreaders used to install chevy V8 exhaust manifold.
I wonder how he turned the nut. A wrench would be a necessity.
I would think if you could make and own that bar spreader in prison having (or making) a wrench would be no big deal.