This spring assisted knuckle knife was designed in the USA. When extended it resembles the trench knife that was named for its use in trench warfare during WWI however our verison is foldable to make it more compact and easier to carry. It features a 3.5" 420C stainless steel blade and a Black aluminum handle with clip. Measures 5" closed and 8.5" overall length.
Many states restrict the sale and/or the ability to conceal these items so check your state and local laws before ordering.