Part# ELM X492 #92 Replacement Blades SIZE: Pack of 15 X492 Replacement Blades, For Utility Knife, 15/PK, EPIX492, EPI X492, Heavy-Duty Utility Blade is ideal for heavy-duty all-purpose cutting and scoring. Works on matboard, carpeting, wallboard, wallpaper, tile, plastics and wood. Fits Elmer's X-Acto Utility Knife, Ergo Utility Knife and Surgrip Retractable Utility Knives. X-ACTO knives are the preferred cutting tool for a wide variety of professionals and hobbyists alike. Designers and artists love the X-ACTO knifes ability to produce careful and meticulous cuts with consistency, while engineers praise the knifes durable design and reliability.