Well the one I posted was foldable with that little tweak that you can open it against the pocket while pulling it.
Requires large pockets, but hey, I am used to dress around a weapon
This is the very one they offered me in the gun shop last time. Just with a little different texture on the grip - the guy’s selling line was "it ain’t gonna slip once your hands are full of blood."
I asked a Hungarian friend to let me know what their rules on carrying knives are. I know their gun rules are ridiculously restrictive, hopefully knives are better.