Fully retractable knife features a safe, retractable no. 11 blade. Easily change the blade as you would with any X-ACTO no. 11 blade. The knife is perfect for delicate, precision cutting and trimming of lightweight materials, such as paper, plastic, balsa, thin metal, cloth and film. The soft, triangle-shaped comfort grip provides extra control. Anti-roll handle keeps the knife from rolling off your work surface. Retractable knife also offers a metal core construction for durability. Sold as 3 Pack