One-hand knife for quick releasing the blade

One-handed knives are designed to open the blade quickly in any situation. To open the knife, one or more opening mechanisms are attached. These opening mechanisms can be different in their form and mechanical function. The most common opening mechanisms are the flipper, the thumb hole and the thumb pin on one or both sides. The one-handed knives can usually be opened with the index finger or the thumb and are always secured by a lock.