Z-Series No. 1 Precision Knife features a safety cap, solid aluminum handle and one of the sharpest and most durable blades. The gold hue on the cutting edge is a zirconium nitride coating applied at the atomic level after blades are atomically sharpened. It is designed for delicate, precision cutting, trimming and stripping. The blade easily cuts paper, plastic, balsa, thin metal, cloth, film and acetate. Knife includes a No. 11 Classic Fine Point Zirconium Nitride-coated Blade.