Product review (2 stars): Didn't work for me - waste of money
I took me days to get the doggone rubber rings on but I finally got the trick to it. I tried to use it In my Waste King disposer but could not get any satisfactory performance out of the thing because the bottom ring kept coming out even though it was installed correctly. I tried every way I could to get it to stay in the disposer opening without popping a rubber ring. No luck.  It was not worth the money I paid for it. You can take the capital "S" out of the name now.