X-ACTO Z-Series Zirconium Nitride-Coated #11 Style Fine Point Blade – Bulk Pack of 500 – Precision cutting, detailing, trimming, stripping of paper, plastic, balsa, bass wood, rubber, vinyl, thin metal, acetate, cloth. ZrN-coated Blade is corrosion-resistant and edge is proven to be 5X harder and stays sharp 7 – 10 times longer than standard blades. Use with Handle Style(s): #1, #1 Safety Grip, X2000, Gripster, Cut-All, #3.