A type of knife that opens by force of gravity or centrifugal force, combined with the application of pressure to a button, spring, or other mechanism in the handle, is the subject of this exploration. These knives typically feature a blade that can be deployed rapidly with one hand. The mechanism often involves holding the release mechanism, pointing the knife downwards, and letting gravity swing the blade out, after which the release is secured to lock the blade into place. An example would be a knife with a blade that slides out of the handle when a button is depressed and the knife is flicked downwards.
The significance of understanding this type of knife stems from its legal implications and its historical context. In certain jurisdictions, possession of such a knife is restricted or prohibited due to concerns about its potential misuse. Historically, these knives have been associated with military applications, particularly in situations where rapid blade deployment is necessary. Recognizing the operational characteristics and legal status is crucial for responsible ownership and adherence to relevant laws.