The Durand TM removes old and fragile corks whole and undamaged. Instructions for use are printed on the inside of the reusable wrapper that encloses the cork presentation box of the Durand.
You can view a video that explains how here: https://www.youtube.com/watch?v=2Os08NMUetA
There is no better corkscrew available in the world, and all serious wine collectors know this corkscrew is worth every penny.
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