X-Acto Ergo-Ulitliy Knife: If you are looking for a traditional box cutter, look no further. The X-ACTO Ergo Utility Knives are designed to cut through materials that are traditionally handled by heavy duty knives, including carpet, wood, plastic and more. Ergo Utility Knives are designed to fit in the palm of your hand for comfort and control, and with its small compact style, these utility knives fit conveniently in your pocket or tool belt. This utility knife is also multifunctional. Simply remove the blade and insert it into the secondary position to use it as a scraper! No tools needed to change the blade. Replacement Blades are the #92 XAC292 Blades.