Review on Premium Non-Slip Jar Opener Set - Perfect for Skilled Cooks by Luis Thompson

They are a bit thicker than regular bottle/can openers. I've tried one for this purpose and it seems to work, although I'm not very good at it because I have strong hands and can usually open jars that are stuck. I actually bought these because I needed small, relatively thin, non-porous rubber pads to mount them on the counter and they are perfect for that. BTW, to answer my question on this board, "small" is a package containing one piece of each shape.