I got these to be used as a cup to grind salt and pepper into. That wasn’t wise because the grinders would have to be actively grinding in order to remove the cap after I ground some. Perhaps I should just use them as described, eh?As the cover for which they’re intended to be, they fit my grinder perfectly (I didn’t have a way to make sure they would be compatible other than the picture of the grinders themselves). They are easy to place and remove, and they protect the mouth of the grinder from oil splatters. I was a bit worried the rest of the family would consider them a nuisance, but nobody has complained and the caps are always in place when I use them, so it appears the rest of the family is just fine with them.