ZT knives, history of the military knives brand made U.s.a. The Zero Tolerance brand, owned by Kai U.s.a. Ltd. Makes its first appearance in 2006, offering the market a first line of new-generation military knives, with the aim of satisfying the needs of armed forces professionals. Initially the production concerned only tactical knives or combat knives, today instead ZT Knives, boasts the production of new lines of survival knives for doctors or firefighters (rescue knives). The Zero Tolerance knives are entirely produced in Tualatin in Oregon, USA, where the ZT knives lines are made with the best steels such as S30V, S35VN or 20CV.
