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Assisted opening knives use an internal mechanism—typically a torsion bar or spring—to complete blade deployment once the user initiates opening. You start the motion manually by snapping the blade into the locked position. The result is fast, one-handed deployment without the legal restrictions that apply to automatics in many jurisdictions.
Unlike automatics, assisted openers require manual input to begin deployment. The mechanism engages only after the blade passes a certain point in its arc, then accelerates the blade to full lockup. This distinction matters legally—assisted knives remain legal in most areas where switchblades and automatics face restrictions. Always verify your local and state laws before purchasing.
Kershaw pioneered the category with SpeedSafe, a torsion bar system found across their lineup from budget-friendly options to premium models. Their assisted folders consistently deliver reliable deployment at accessible price points.
Zero Tolerance applies SpeedSafe technology to harder-use designs with premium steels, titanium frames, and overbuilt construction. ZT assisted knives bridge the gap between everyday carry and hard-use performance.
SOG utilizes their S.A.T. (SOG Assisted Technology) system across tactical and utility designs, offering another proven approach to spring-assisted deployment.
Böker rounds out the selection with assisted options ranging from traditional styling to modern tactical configurations.
Whether you need a reliable daily user or a purpose-built tactical folder, assisted opening knives provide speed and convenience within a broadly legal framework.
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