Product review (3 stars): Will These Fit Your Range?
These don't fit our range (argh!).  I saw a lot of buyers complaining about fit issues, so I knew that might be a problem when I ordered.  Since I didn't see anyone explain HOW the knobs didn't fit (so I could decide my chances before ordering), I'll try to explain what the issue is with my range.

The problem is how far the top of shaft extends above the panel that covers the gas valves.  In my case (a Caloric range) the top of the shaft is level with the cover panel.  That means any usable knob has to protrude below the cover panel to engage the valve shaft -- neither of the adapters provided with these knobs do that.  It looks to me like one set of adapters are intended for shafts that extend about half an inch above the cover panel and the other set is for shafts that extend about 3/4 of an inch above.  Hope that helps.