Product review (5 stars): Perfect replacement knobs
I purchased these knobs to replace the broken set that was literally just hanging on and/or falling on to the cook top.  I was afraid to put too much pressure on them while installing them, because it didn't seem like they were going to fit at first, so I made my husband do it and they went on beautifully.  So don't be afraid to apply the extra pressure.  They look great and now I don't have to worry about them falling off anymore.