Product review (2 stars): Fits Waste King disposer, but doesn't allow water to drain!
Originally I was impressed with the quality of this item as it seemed to be very solid and substantial.  But then I placed it in the drain and noticed problems.  It slides down into place just fine, but the tightness of the fit causes the fingers of the splashguard are pressed tight together by the fitment.  This causes water to not drain properly - the hole in the middle of this not sufficient to prevent water from backing up in the drain and leaving food particles on the sink surface rather than going down the drain.

The stopper is a cheaper part than what came originally with the Waste King disposal, too.  The original has a rubber flange around the edge of it that creates a nice, tight seal to prevent water from draining out of the sink, but the new stopper only stops water by fitting within the inner diameter of the rubber splash guard, which is much more difficult to get in place and get to seal properly.

So water doesn't drain when it's supposed to, and drain when it isn't.  Pretty ironic, huh?