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ZT 0556
The Zero Tolerance 0556 is ZT's first out-the-side push-button folder and the model that brought the brand into the premium deployment category. Built around a 3.35-inch CPM MagnaCut drop point and a titanium frame with carbon fiber inlays on both sides, the 0556 reads closer to a refined EDC than a traditional hard-use ZT. It's the knife that proved the brand could build clean, office-friendly push-button deployment without compromising the overbuilt construction that defines the catalog.
Push-Button Deployment and Lockup
The 0556 fires on a low-profile push-button mechanism seated at the spine of the handle. Press the button and the blade snaps into lockup decisively, held in place by the same button that deployed it. Closure runs the reverse path: hold the button, swing the blade closed against spring tension, release. The action is crisp and confidence-inspiring, built to the same tolerances ZT applies to its KVT flippers, and the button travel is short enough to cycle repeatedly without fatigue. Unlike a flipper, the 0556 needs no grip adjustment or wrist flick to deploy, which is why buyers who work in gloves, in cold weather, or with occupied hands gravitate to push-button platforms.
Blade and Handle Construction
MagnaCut is the steel choice across both variants, delivering the balance of edge retention, toughness, and corrosion resistance that has become the new benchmark for premium EDC folders. The standard 0556 wears a two-tone stonewashed and satin finish. The 0556BLK steps up to a bead-blasted black PVD coating on both blade and titanium handle, with matching black hardware for a fully subdued carry profile. Blade thickness stays thin at 0.09 inches, so the 0556 slices well despite the push-button platform. Closed length runs 4.4 inches and carry weight drops to 2.4 ounces, lighter than most ZT flippers of comparable blade length. A reversible deep-carry pocket clip handles tip-up carry in either pocket.
Who the 0556 Is For
The 0556 is the pick for carriers who want premium push-button deployment in a package that dresses up for work and dresses down for weekend carry. It suits professionals, collectors adding their first ZT push-button folder, and anyone who has been waiting for the brand to enter the category with a knife built to the same standards as its flagship flippers.