Zero Tolerance

Zero Tolerance is a premium knife brand established by Kai USA Ltd. in 2006, created to serve the demanding needs of professional users and knife enthusiasts who require uncompromising performance. Born from the same parent company that produces Kershaw Knives, Zero Tolerance was developed as a distinct line focused on producing hard-use folding knives and fixed blades built to the highest standards.

The brand's philosophy is embedded in its name—zero tolerance for anything less than exceptional quality, materials, and manufacturing precision. Every Zero Tolerance knife is proudly made in the United States at the company's Tualatin, Oregon facility, where advanced CNC machinery and skilled craftsmanship combine to create tools designed for the most rigorous applications.

Product Focus and Design Philosophy

Zero Tolerance specializes in tactical and everyday carry folding knives that feature premium materials rarely found in production knives at their price point. The brand is known for incorporating high-performance blade steels such as S35VN, CPM-20CV, and M390, paired with robust titanium frame locks and handle scales. Their designs often feature oversized pivots, thick blade stock, and reinforced lock mechanisms that provide exceptional strength and reliability.

The brand collaborates with renowned knife designers including Rick Hinderer, Dmitry Sinkevich, and Ken Onion, bringing custom knife aesthetics and innovation to production models. This approach has resulted in popular models that blend tactical functionality with refined ergonomics and striking visual appeal.

Build Quality and Target Audience

Zero Tolerance knives are engineered for professionals in military, law enforcement, and emergency services, though they've gained a devoted following among collectors and EDC enthusiasts who appreciate overbuilt construction and attention to detail. The brand's commitment to American manufacturing, premium materials, and rigorous quality control has established Zero Tolerance as a respected name in the premium production knife market, offering custom-quality features at accessible price points.