Rotating or pressing one or more handles will rotate one or more cams which push on the lid side. This causes a lever to rotate and forces two opposing jaws to press on the jar. With further rotating or pressing, the cam(s) rotates more and its rough surface or teeth forces the lid to rotate with high torque. Since the cam size is smaller than the lid diameter, much less force is needed to open the lid. And since the jar lid opener grips both the lid and the jar at the same time, there is no need to hold the jar tight while rotating or press the handles.