Originally Posted by
maddog34
here's what i use on Fixed cups with wrench flats... it works every time, even removing the "Really rusted in place" cups.
Ebay search: "Bicycle Bottom Bracket Tool for 36mm Box End Fixed Cup remove"
I haven't seen that one before, but it looks like it would work well. The price isn't bad, either, assuming you don't get nailed by import tariffs.