So is this wrench I have, from an auction "treasure box" lot that I've never identified, one of these J tools?
Looks just like a wrench that came with a bicycle. The large side was for adjusting/removing the bearings on the crank.
I made the Input Shaft Wrench from 1/8” flat stock. I welded two pieces together as I didn’t have any plate wide enough. Crude but effective.
