Z-Series No. 11 Blades Precision Knife with Blade and Safety Cap

X-acto Z-Series blades are 7 to 10 times sharper than the current number 11 blades. The cutting edge of the blades is coated with zirconium nitride, which shows as a golden hue. This adds strength to the blade. Z-series blades are available in packs of 5,