Product review (3 stars): Works but it can only turn in one direction and ...
Works but it can only turn in one direction and work, and it did not connect as deeply as the OEM knob.  Not sure, this could be a slight mismatch, or maybe this is why the original knob broke after only 4 years of use.  That is to say that maybe the original was designed to go in only one direction as well.

Update 8/28/2017:  Knob was not staying attached & kept popping off.  Found a youtube video for changing the timer knob.  Found out that when the old one is removed it leaves a small metal sleeve on the timer.  that sleeve must be removed with a needle nosed pliers.  The new knob has the sleeve already inserted which is why it does not immediately fit.  After I removed the metal sleeve and attached the new knob, it immediately popped in properly for a secure fit & worked as the original one.  My only gripe is that no instructions came with the replacement to mention that little detail for replacing the knob.