The Fury Ninja Adjustable Weight Throwing Knife Three Piece Set with Nylon Sheath, Black is manufactured by Joy Enterprises the owners of Fury, Fury Tactical and Mustang products and the importer of Muela of Spain. With production in the USA, Europe and Asia, Joy has been providing high-quality, valued priced products since 1941. Many of our products are proprietary designs (often copied) and others inspired by classic survival/defensive tools and edged weapons. Joy is proud to offer a limited lifetime warranty on all products. Enjoy and be careful.