Where is the resistance arm in a bottle opener?

In a bottle opener, the resistance arm is typically the part that holds the bottle cap in place while the lever is pulled down to pry it off. This section is often located at the end of the opener where the curved notch or hook engages with the cap. When force is applied to the lever arm (the longer part of the opener), the resistance arm provides the pivot point against which the cap is removed. This design allows for efficient leverage to open the bottle.