The X-ACTO #5 heavy-duty plastic knife is a durable, hardworking knife that can stand up to some of the toughest tasks. The heavy-duty knife handle is compatible with X-ACTO #2, 15, 18, 19, 22, 23, 24, 25, 26 and 28 blades as well as the router assortment and saw blades. The #5 heavy-duty plastic knife handle comes packaged with the X-ACTO #19 angled wood chisel blade. 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.