Product review (4 stars): Burner knob for Whirlpool
I was so happy I was able to find it.  However, the black piece fell apart from the silver piece.  I was able to push them back together and it worked...but it is not as strong as the original one.  I had bought 4 to replace them all but these new ones were not as strong so I just replace the two I needed and saved the new ones for later.