Olfa Special Black Blade Large Size Utility Knife Replacement Blades (25 pack) LBB25K

The Special Black series of blades from Olfa emphasizes sharpness. They are sharper than typical utility knife blades, because the cutting edge is ground at a sharper angle.

The added sharpness means they can cut through corrugated cardboard, plastics, and multiple sheets of paper without much force, but they will dull slightly faster than a standard utility knife blade.

If you're cutting thicker or more rigid materials often, Olfa Special Black Blades are just right for you. If you need a blade for less heavy-duty work, try the Olfa Speed Blade.

This pack of 25 blades comes in a special blade case that can be clipped to your pocket or work belt, giving you one-touch access whenever you need to change blades. Suitable for Olfa large-size (18mm) cutters.