844.S18L10PB General Purpose Snap-Off Blade Knife Blade, 7 Blade. Facom snap-off knife blade with 7 blade segments. This professional and high-quality replacement blade is suitable for any safety knife that takes 18mm blades. This blade from Facom is ideal for everyday cutting applications and is supplied in a handy dispenser to ensure the blades are safely stored away. The dispenser is also useful for these types of blades as it can help the segments snap off with ease when they become blunt after usage, allowing for optimum user safety.