Zero Tolerance Knives (ZT) is a premium knife brand established in 2006 as a subsidiary of Kai USA Ltd., based in Tualatin, Oregon. Renowned for producing high-performance folding and fixed-blade knives, ZT collaborates with esteemed custom knife makers to create designs tailored for military, law enforcement, and everyday carry enthusiasts. All ZT knives are meticulously crafted in the United States, utilizing top-tier materials such as CPM-20CV, S30V, and S35VN steels, along with handle scales made from G10, titanium, and carbon fiber.