The bottle opener/screwdriver combination on mid-sized and larger Swiss Army knives from Wenger combines the following features:
Uses: The bottle opener (cap lifter) is a bit of anachronism, now that most bottle caps are twist-off. However the screwdriver tip is very useful, and the tool also works well for various other scraping and prying functions.
WARNING:if you use excessive force when prying or twisting, it's possible to warp the blade, or the blade mount (which will give it some "wiggle"). However, newer Wenger knives have a patented blade lock on the screwdriver which helps hold it in place.