One of my all-time "tactical" folder favorites is my Spyderco Yojimbo.
I tried not to like it, I really did, but it grew on me.
It's shorter than legally permissible, but still deadly and quick, and yes, its great for opening boxes too.
![Grin ;D](https://www.michaelbane.tv/forum/Smileys/default/grin.gif)
Recently, Ive been using it for
dangerous things like cutting cardboard and plastic sheeting for a jaycee haunted house.
The only problem I see is it is almost impossible to close it one-handed due to the location of the lock.
The knife is no longer a production item, but I encourage people to seek them out.