Product review (5 stars): Perfect fit at a fraction of the price
I checked online and replacement knobs from the manufacturer and Sears were as high as $35. Yikes!  This was a steal and it arrived within a week.  The original was all plastic, this has a metal back and is less likely to break than the original.  Make sure you remove any and all remaining pieces from the shaft before installing the replacement knob, or it won't fit correctly.  Just pry them out with a screw driver and/or a pair of pliers, then push the new knob on.  I would buy this again and from this company again.