24 Del. C. § 901: License requirement.

No person shall engage in the business of selling any pistol or revolver, or stiletto, steel or brass knuckles, or other deadly weapon made especially for the defense of one’s person without first having obtained a license therefor, which license shall be known as “special license to sell deadly weapons.” No person licensed or unlicensed shall possess, sell or offer for sale any switchblade knife.

This section shall not apply to toy pistols, pocket knives or knives used for sporting purposes and in the domestic household, or surgical instruments or tools of any kind.