The original X-ACTO knife has been praised for more than 50 years as the standard for precision. Attaining this level of precision, accuracy and reliability starts with supreme quality craftsmanship. X-ACTO knife blades are crafted with sharpened carbon steel for a reliable cut and a strong blade. X-ACTO knife blades fit with most X-ACTO knife models. Now our number 11 blade is available in a convenient 5 pack as part of our Designer Series. The X-ACTO Number 11 Classic Fine Point knife blade is the perfect accessory to a true tool of precision. When elaborate, detailed cuts need to be made, the number 11 blade is the one to choose. Because the blade is made with quality sharpened carbon and steel, you can make the most meticulous cuts knowing that the blade can stand up to the pressure. The number 11 blade is a perfect as a scrapbooking knife or crafting knife. 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.