This is the corkscrew most commonly sold in stores (see Figure 1). Its main structure is like two wings, so it is called a wing-shaped corkscrew. The principle of Kaiping is also like a sommelier's corkscrew, using the lever principle to turn the cork out of the cork by turning the screw into the cork. The specific operations are:

1. First align the corkscrew at the center of the opened wine bottle mouth;

2. Turn the handle on the top of the corkscrew to drill the screw plug into the cork. Take care to keep the auger drill down vertically and do not penetrate the cork. At this time, the handles on both sides will become more and more open due to the downward drilling of the auger;

3. Close to the bottom of the cork, after opening the wings of the corkscrew, press down the wings with both hands, and the cork will open accordingly;