Stanley Heavy-Duty Utility Knife Blade features pointed razor-type reversible blades designed for utility knives, offering versatility and durability. These heavy-duty blades are compatible with Model No. 99, 199, 299, and 1299 knives, as well as most other utility knives, making them a reliable choice for various cutting tasks. The blades are made from carbon steel, ensuring long-lasting sharpness and strength. Certain packages, such as Model No. 11-911A and 11-921A, come with a sturdy plastic dispenser that enhances safety and convenience, and the blades include hang holes for easy wall mounting. With blade lengths of 2-7/16 inches and two holding notches for secure mounting, these blades are ideal for heavy-duty cutting needs. Available in different package quantities, they cater to both individual and bulk usage.Model Number: 11-921A