Product review (3 stars): These were a little loose when i installed them and ...
These were a little loose when i installed them and it seems I need to use some kind of glue to keep them in the metal hole.  OF course some of the glue would need to withstand high temps since this is on the stove and can heat to some significant temperatures.  My suggestion is for the price, but an extra pack for when they fall out and get lost...you have backups.