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.