Composite tool typically chosen by the professional wine waiter to uncork bottles.
It consists of a corkscrew and a knife that can be folded out. Sometimes there is also a bottle opener that also serves as a support point for the lever. It then rests on the neck of the bottle when the cork is pulled. The neck lead can be cut with the knife. A curious model contains a folding lever (1).
A newer model works with a rack and spiral. There is also a retractable blade to cut the neck lead.
See also the pocket knife. [MOT]
(1) WATNEY & BABBIDGE: 71, fig. 62.