The Victorinox mini screwdriver fits into the standard corkscrew, which is available at most of Victorinox pocket knives. It is therefore occupies no additional space and if you're not open wine bottles it does not bother there.
What I noticed is positive only after the purchase, is that the handle of the mini-screwdriver, a 6-square shape in default has 1/4 "size. As a result the Mini Screwdriver also fits into a bit holder.