Product review (1 stars): Not necessary for your new Waste King and may actually be LESS convenient
Definitely agree that no one should need this adapter.

I bought this to replace an existing Insinkerator Badger 3-bolt mount.  After realizing that this adapter adds about 1.5 to 2 inches to the height (from bottom of sink), you start to wonder how a 2-sink configuration with existing piping is going to fit in perfectly.  In my case, it did not.  It was ridiculously easier and cheaper to just go buy a 2 dollar canister of Plumber's Putty and install the EZ-Mount directly to the sink.  After that, it bolted (well twisted) right on and I was up and running.  I definitely don't recommend anyone buy this and just to go buy some Plumber's Putty instead.  It's nice if maybe you have only one sink.