Zero Tolerance's spring assisted folding knives deliver the same uncompromising USA made build quality the brand is known for in a fast, one-handed deployment platform that is legal in the vast majority of U.S. states. At the heart of this lineup is the legendary ZT 0350 — one of the most iconic and best-selling assisted opening tactical knives ever produced. Built around a S30V stainless steel blade, textured G-10 and stainless steel handle, and a robust liner lock, the ZT 0350 set the standard for what a hard-use assisted opener could be when Zero Tolerance introduced it, and it remains a cornerstone of the lineup today. Variants like the ZT 0357 bring a tanto blade geometry to the same proven platform for those who prefer a more aggressive tip profile purpose-built for tactical and utility applications.
The ZT 0770 rounds out the Zero Tolerance assisted opening lineup with a sleeker, more refined everyday carry profile — a slimmer handle, smooth assisted flipper deployment, and CPM 20CV blade steel that elevates it well above typical spring assisted production knives. Every knife in this category ships sharp from the factory, locks up rock solid, and carries the full Zero Tolerance commitment to materials, tolerances, and fit and finish that no other brand at this price point can match. Whether you want the proven hard-use credentials of the 0350 platform or the refined carry of the ZT 0770, this is spring assisted performance at the highest level it has ever been produced.
Browse the full Zero Tolerance spring assisted knife collection below and find your next fast-deploying ZT.