If the knife has a lock on the blade its forbidden, only for work, hunting and fishing its okay to carry it......
If you can open it with one hand, its very forbidden.....
If I go hunting and stop on my way to buy a Cola I have to take of the knife before I went to the shop, but I guess I´m a little unlawful there too
If the knife is under 7 cm , the blade, and no lock, you can carry it, but not if you go to the bar for a beer
As I know, and its a lot, Denmark is the only country where Leatherman make a multitool without holes in the blade, for opening with one hand.

This one I´m not alowed to even own, it gives over 1 year in prison....
Knife law in Denmark
