These are less likely to be found on simple, 'picnic-wine' corkscrews than on the more complex models. Very popular today is the relatively sophisticated wing-type corkscrew . Its shank sits within a bell-shaped frame the base of which is placed on the top of a wine bottle to begin the opening operation. As thehandle is turned and the helix or auger worked down into the cork, 'wings' swing out from the frame via a gear mechanism, reaching their apogees once the working end is entirely engaged with the cork. Because most wing-type corkscrews never fully extract the cork, because they are rather bulky, because they often have auger mechanisms, and because cheap models are prone to failure due to poorly attached shanks or poorly tempered wires, I do not favor this type of corkscrew.
All sections fold together to form a compact, pocket-size unit.
Another comes with a pair of sharp cutting wheels set in a recessed section of the handle. Still another boasts a contoured, serrated cutting edge in its swing-out lever. Rock the handle back and swing out from its top the waiter-type corkscrew's notched lever. Set the notch on the bottle's lip, grip the bottle's neck and hold the lever in place with one hand while drawing up the handle of the corkscrew with the other to extract the cork. The major drawback to the waiter-type corkscrew is that an awkward angle forms when a long cork is extracted, encouraging part of the cork to break off.