Product review (5 stars): Unbelievable Price.
Fantastic purchase, Knobs were far superior to the OEM knobs that came on the range top.  Inserts work perfectly,  Read some reviews that talked about enlarging the holes.  That was not required.  I believe the inserts were put into the knob upside down, which would prevent the knobs from fitting onto the burner spindle.  They can be inserted into the knob for either horizontal or vertical spindle orientation.  Review stated would not seat properly on the knob. The power marking rings have 4 small notches that must be alinged with 4 little tabs on the knob themselves, must look closely at the knobs to see.  My power indicator markings scrubbed off the originals, these markings won't suffer the same fate.  You get 5 knobs. the extra is for the oven and has two power indicator rings for either clockwise or counter clockwise indication.