No. 1 Precision Knife is designed for delicate precision cutting of lightweight material like plastic, paper, balsa, cloth, thin metal, film and acetate. Cutting and trimming tool is used by graphic artists, designers, hobbyists and others for making careful cuts and trims consistently and with confidence. Design features a lightweight handle. Knife includes a No. 11 Classic Fine Point Blade and uses No. 10, 11, 12, 13, 16 or 17 blades.