Originally Posted by
JohnDThompson
No, pretty much any single-tooth lockring tool for bikes will probably work. In the old days there were lockrings on headsets that required a tighter curve than on a bottom bracket lockring (or a hinged hook) but those haven't been on the market for several decades now. If you want to get fancy, a lockring pliers will grab the ring more securely than a hook type tool, but isn't strictly necessary for the task.
Hell if the OP just wants to get it off a flatblade + hammer will do as well. If he wants to actually reinstall that properly, just get the right tool. The hozan will do bb and track lockrings: