Finishing up on this exciting info is the last 2. The wing or double lever corkscrew, has two lever arms that project from either side of the bottle when the corkscrew is fimly inserted in the cork. To remove the cork you merely press the two levers down. The wooden corkscrew with count screw functions with a minumumof effort on your part. the corkscrew is inserted by turning the handle at the top and the cork is removed by turning the larger lower handle. The newest aid to uncorking a bottle is a device called the "Ah-so" it actually does not pierce the cork but is pushed down on either side of the cork and then wiggled up and out with a bit of exertion on your part. I must say I prefer the double lever and the Ah soo. How about you?