Not all blades are the same, these Olfa 18mm heavy-duty, ultra-sharp snap-off blades are a staple for precision cutting. These dual-honed black blades are crafted from premium Japanese carbon steel and are 25% sharper than standard silver blades. Keep plenty of these must have staples on hand in your sign shop with this convenient 10 pack. Each Olfa blade features eight snap-off cutting edges per blade always allowing for a sharp edge, which means this 10-pack has a total of 80 cutting edges. These premium Olfa 18mm snap-off blades come in a convenient plastic storage case allowing for a sharp supply of uninterrupted work. Features: Always have a sharp cutting edge with the easy snap off design Made of premium Japanese carbon steel Dual-honed black blades are 25% sharper than standard silver blades 18mm width fits most 18mm snap-off knives Each blade features 8 snap-off cutting edges Package of 10 blades contain a total of 80 cutting edges Blades come in a convenient plastic storage case