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