The X-ACTO heavy-duty snap-off knife features a blade that is tough enough to cut through almost any material and is great for tough home construction projects and renovations. The unique design allows you to snap off the blade when dull for an instantly sharp edge. X-ACTO knives are the preferred cutting tool for a wide variety of professionals and hobbyists alike. All X-ACTO knives are built with a carbon steel blade for a reliable cut every time. Additionally, they are crafted with a sleek design that fits comfortably in the hand, allowing you to continue making the precision cuts needed to finish the job, no matter how long it takes. - 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. 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.