X-Acto Z Series #11 Blades
The Z-Series is X-Acto's sharpest, most durable blade ever. When creating these new blades, the goal was to design, develop, and manufacture a number 11 blade that is absolutely "best in class."
The gold hue on the cutting edge is a zirconium nitride coating applied at the atomic level after blades are atomically sharpened. The result is the sharpest blade in the industry.