X-Life Heavy-Duty Utility Blades are ideal for heavy-duty, all-purpose cutting and scoring. Utility blade is oxidized to resist rust and increase durability. Design also features a thick base and razor sharp edges, making it an ideal blade for construction work, home remodeling and other tough tasks. Durable blade works on matboard, carpeting, wallboard, wallpaper, tile, plastic and wood. Blade fits Elmer's X-Acto Utility Knives.