These Tungsten Carbide Razor Scissors from Anadromous Fly Company are impossibly sharp and incredibly durable! The 4" blades can handle hair, fur, synthetics and nearly all other soft materials! Choose no coating or the stealth look premium ceramic coated tungsten carbide blades. These really hold an edge for reliable cutting every time! (Caution: Do not over tighten the thumb screw! High tension is unnecessary for their ideal operation and may strip the threads.)