The rack opening of the Brucart corkscrew is the most clever and original uncorking system. It allows to extract the cork without effort. It is graded to control how deep is the perforation of the spiral. Instruction for use: Cut the foil with the knife, put the corkscrew on the cork and while making 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..