I find this jar opener hard to use.  The space that holds on to the jar top doesn’t seem deep enough for most jar tops. The one or two times I could get it to grip the jar too it was great - opened with ease; but with other jars I just can’t get it to work.  It comes with a silicon mat to put under the jar when you are opening it, which does help! I usually LOVE their products, but this one just doesn’t work for me