I have arthritis and also a demyelenating neurological disorder that causes pain and weakness in hands. I have had trouble for years opening jars and bottles. My husband (love him dearly) bought this for me and it has been a lifesaver. I have used this to open pickle jars, jam, soda bottles and even my water bottles. It's adjustable and uses little metal teeth (which I was opposed to previously) but if you secure it nicely on the lid it works spectacularly! No more frustrating nights home alone not being able to open things...this device has been great for me and I recommend it! Keep in mind, there is a crank handle to turn on the top of it to adjust the teeth to meet the diameter of the lid, so if your pain is too bad or you have loss of dexterity in your hands this may not work for you....but it's worth a try. I was a little scared of the twist knob on the top, but have not had any trouble with it.