The rack opening of the Brucart corkscrew is the most clever and original uncorking system. It allows the cork to be extracted without any effort. It is graded to control how deep the perforation of the spira is. Instructions for use: Cut the foil with the knife, put the corkscrew on the cork and with a slight pressure keep turning it until reaching a desired depth with the spiral. Finally, pull out the handle and start the jack-like movement.