05-14-2008, 07:04 PM
I don't know about commercial jar-openers, as I've never used them. I used to row competitively though, and while we had strong hands, I often had blisters on my palms that made using my hole hand to open jars pretty painful. What I did was take a thick rubber band and wrap it a couple of times around the lid (and you can also wrap one around the jar itself to keep that from slipping in your other hand). It works just like a rubber gripper, but isn't at all awkward or hard to use. Hopefully that helps!