Product review (4 stars): Worked fine for me on a 30 year old dacor cook top!!!
Well - much to my surprise - they worked!  Based on some of the reviews I did not expect much. I have a 30 year old Dacor cook top that I cannot purchase knobs for that still works great. However, the plastic knobs basically disintegrated. They are the push in and turn infinite knobs. There was an adapter in the package that fit and the new knobs work just fine. They are just cheap plastic knobs but so were the dacor knobs and that is an expensive cook top. I certainly couldn't afford to replace it with another one. These knobs saved me a lot of money. what good is a cook top that you can't turn on?