The X-ACTO Designer Series#1 Craft Knife offers superior precision cutting and ergonomic control. Our #1 craft knife is perfect for cutting lightweight materials, such as paper, plastic, balsa, thin metal, cloth, film and acetate. Made with a rear blade release and safety cap, this crafting knife was designed with safety in mind. The #1 Craft Knife also includes a #11 blade, and can be fitted with No. 10, 12, 13, 16, and 17 X-ACTO blades. X-ACTO knives are the preferred cutting tool for a wide variety of professionals and hobbyists alike. Designers and artists love the X-ACTO knife’s ability to produce careful and meticulous cuts with consistency, while engineers praise the knife’s durable design and reliability. X-ACTO knives can make precise cuts through a variety of different craft materials: