I could never pop a cork with a hand corkscrew...last time I tried I ended up in the shop using a pry bar, towels, gloves and goggles Maybe the wine I buy has exceptionally long corks..
It doesn't matter if it's useful or not, all SAK's have to have them and that's just it.
Tim Leatherman starred in it . I see two problems , possible blade breakage , and you will have a bit ofa problem recorking with a split cork . Never had a problem with SAK corkscrews .Chris