bike spanner tool for star union CM5001 mid drive motor sprocket nut

The motor broke on my cyberbike.  Turns out you need some special tools to swap it out.  This design is the tool to properly remove the nut that holds the sprocket mount.  Note you also need a crank puller to remove the crank arms.  This is your next challenge behind the cranks.  You could probably do this with a large set of channel locks but this tool is nice.

the hex is 40mm and works fine with a large adjustable.