This jar opener works pretty well. It expands to fit larger jars. The metal clamps tighten as you twist the top/handle
I was skeptical about ordering this. I've bought a few lid openers in the past few months and none have helped me with larger sizes. I have severe arthritis in my fingers and have a terrible time to open jars and there is no one else here I can ask to help me. This jar opener actually opened the lid I have the hardest problem with. I've tried it on several jars now and it works each time. I did have a little trouble getting it to attach to the jar until I realized I was doing it wrong. It's actually easy to work.
I have bought, over the years, several jar opener gadgets, but most of them were a total waste of money - because they really didn't work - or did work only after much concerted effort, but were certainly not easy and quick. This one is. In fact, it's about as easy and quick a jar opener as you could ever wish to find.
I have needed a jar opener for a long while now> I was worried about quality and remember my Mom had one like this 40 years ago that worked well and was very durable. I ordered based on the positive reviews and was not disappointed!