Elmer's X-Acto X292 Replacement Blades,f/X-Acto Utility Knives, 5/PK, STST Sold as 5/PK. Use No. 92 replacement blades for Hunt X-Acto Double Duty Cutter/Scraper. Heavy-duty utility blade is a durable blade that fits all X-Acto utility knives. The durable, all-purpose blade features a thick base and razor sharp edges, making it an ideal blade for construction work, home remodeling and other tough tasks. Blade is tough enough to work with the following heavy-duty materials: mat board, carpeting, wallpaper, plastics, hard/soft wood and drywall.