Product review (1 stars): Fortunately this worked to the point where I could get ...
While this looked identical to my broken coupler when I opened it (aside from the metal fitting rather than plastic) , it did not fit when I attempted to replace by broken coupler.  Since it would not slide onto the motor (despite hammering away), I used a power drill to shave off some metal fillings.  Fortunately this worked to the point where I could get it on with some serious force.