Anyone who has ever worked in a restaurant is very familiar with this style corkscrew.
The waiter's lever is still popular with bartenders and restaurant staffs. It is compact and folds up like a pocket knife. Its handle is hinged and one end has a fulcrum which rests on the bottle lip. Newer models like this one uses a 2-step lifter that improves leverage. This model by Le Creuset has a non-stick coasted screw, serrated foilcutter and bottle opener, and is made from stainless steel.
This device requires some skill because beginners tend to pull the cork out at an angle, bending and often breaking it. If pulled straight up, it does its job as well as any other. Cheaper models usually have a short helix which rip corks in half.