Olfa HD Ultra-Sharp Black Blades are designed for cutting performance. making them the ideal blade for applications where superior sharpness is required. The Ultra-Sharp blades are constructed of premium, Japanese carbon tool steel, and they are 25% sharper than standard OLFA silver blades. These 18 mm blades fit most Heavy-Duty handles.
Contains 10 blades per pack, and each blade has 8 cutting edges.