Originally Posted by
due ruote

Looks like a Park BBT-22 would do it. It appears you've somehow broken off part of the toothed rim that the tool engages, so proceed with caution. It's generally a good idea to bolt the tool to the spindle, either with a crank bolt or, if necessary, a longer bolt, so it can't slip out of the notches when you lean on it with the wrench. In your case that's probably essential.
i don't think the lip part is broken, because on the other side of the bracket there's the same "partial" lip.
BUT...it has been there for a few years...