# Zyac Design Z01S: A Shapeshifting Titanium Folding Knife This innovative pocket knife transforms its handle length to bridge the gap between folders and fixed blades. - **Source:** [Yanko Design](https://brifing.si/source/41d28791-ef47-4e0b-a40a-2a5efca0c11b) - **Published:** 2026-11-02 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/f7d546c5-5f43-4275-8460-b7315e74fbc3 ## Bridging the Knife Debate The Z01S from Zyac Design attempts to resolve the classic conflict between fixed blade reliability and folding knife portability. By utilizing a Grade 5 titanium frame, the knife allows users to adjust the handle length while the blade is deployed, effectively creating a hybrid tool that adapts to specific cutting tasks. ## Dynamic Handle Adjustment Users can shorten the handle by pressing a release button and sliding the rear section forward. This mechanism locks the handle into a compact position, bringing the user's hand closer to the blade for precise control. Extending the handle back to full length provides a conventional grip for heavier, more demanding cutting applications. ## Dual Locking Safety System Safety is managed through a standard liner lock combined with a secondary interlock that engages only when the handle is shortened. This design prevents the blade from folding even if the primary lock is released. The knife requires a deliberate two-step process to close, ensuring the handle cannot slide while stored. ## Deconstructed Industrial Aesthetic The Z01S features a deconstructed design, exposing screws, plates, and the sliding structure rather than hiding them behind scales. This architectural approach, inspired by the Centre Pompidou, allows users to visually track the mechanical movement during operation. The handle also includes slots for tritium or photoluminescent tubes for low-light visibility. ## Versatile Deployment Options Zyac Design provides multiple deployment methods to suit individual preferences, including a back flipper, front flipper, and thumb studs. The thumb studs are specifically positioned to facilitate middle-finger flicking. By offering these diverse options, the manufacturer avoids forcing a single deployment style, leaving the choice entirely to the user's tactile preference. ## Premium Material Selection The blade is crafted from Böhler M390 powder metallurgy steel, known for superior edge retention and corrosion resistance. Buyers can choose between a drop point profile for general slicing or a tanto shape for reinforced piercing tasks. The handle is machined from Grade 5 titanium, balancing high strength with a manageable weight. ## Collector-Focused Customization Beyond the standard stonewashed titanium model, Zyac offers premium editions including black zirconium and ZircuTi frames. ZircuTi, a layered laminate of titanium and zirconium, provides a unique striped pattern for each handle. These variants target collectors who prioritize mechanical complexity and exotic materials over basic utility in their everyday carry gear. ## Market Positioning and Availability Currently available via Kickstarter, the Z01S is positioned as a high-end mechanical tool for enthusiasts. With a limited initial run, the project emphasizes its unique sliding mechanism as the primary value proposition. The design prioritizes the tactile experience of the shifting handle, making it as much a fidget device as a knife. ## Sources covering this story - https://www.yankodesign.com/2026/11/01/this-shapeshifting-pocket-knife-becomes-a-fixed-blade-when-you-shorten-its-handle/?utm_source=rss&utm_medium=rss&utm_campaign=this-shapeshifting-pocket-knife-becomes-a-fixed-blade-when-you-shorten-its-handle — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._