I have a Kohler tub waste / overflow set that I'm replacing (installed around 1940), and I've run into a snag. The drain strainer doesn't use the standard X-shaped innards, and I need some sort of internal tool to unscrew the drain cover (strainer) from the tub drain.
Here's the shape I'm looking at:
Anyone seen such a tool that would fit that shape? Search engines aren't working for me here. Any ideas appreciated.
Thanks.