a wrench with a pipe wouldn't have done it?
Made this when I needed an extender....
Made this when I needed an extender....
Yours reminds me of the MAXX LEVERAGE tool.
Sometimes the Best tool is the one You make yourself.

Often times a cheater pipe will create too much slack in the chain and you run out of room to swing it.
I've got a long one that is bent for access at motor mount bolts for doing 3800's in FWD GM cars. Did a few oil pans before I came up with that one.