Buy the Fiskars® 18mm Snap-Off Utility Blades, 5ct. at Michaels. Fiskars snap-off utility blades make quick cuts on a wide variety of home, office and paper crafting materials including paper, cardboard, cardstock, tape, plastic, rages, twine and foam. Precise and easy-to-use, the utility blades pair perfectly with the Fiskars snap-off utility knife for 18 mm blades.