(a) It shall be unlawful for any person willfully and intentionally to carry concealed about his person any bowie knife, dirk, dagger, slung shot, loaded cane, metallic knuckles, razor, shurikin, stun gun, or other deadly weapon of like kind, except when the person is on the person's own premises.
(d) This section does not apply to an ordinary pocket knife carried in a closed position. As used in this section, "ordinary pocket knife" means a small knife, designed for carrying in a pocket or purse, that has its cutting edge and point entirely enclosed by its handle, and that may not be opened by a throwing, explosive, or spring action.
IANAL, typically in NC ordinary pocket knife is less that 4.5" closed. At least less than 4.5" has been ruled as not a dangerous weapon. In some towns they will throw in less than 3" blade too.