X-Acto - No. 1 Knife - With 5 No. 11 Blades - X-Acto No. 1 Knife with 5 No. 11 Blades is ideal for delicate, precision cutting, trimming and stripping. Cuts paper, plastic, balsa, thin metal, cloth, film, acetate and more. Includes a lightweight 4-7/8 inch long aluminum handle with five No. 11 classic fine point blades.