yksittäisavain

Yksittäisavain, meaning "single key" in Finnish, refers to a key that unlocks only one specific lock or a very limited set of locks. This is in contrast to a master key, which can open multiple different locks, or a passkey, which might open a group of locks but not necessarily all of them.

The concept of a yksittäisavain is fundamental to lock and key systems. Each unique lock cylinder is designed to accept only a specific key profile, often referred to as a "keyway," and a particular arrangement of pins or tumblers that correspond to the cuts on the key. When the correct yksittäisavain is inserted, it lifts the pins to the shear line, allowing the cylinder to rotate and the lock to be opened.

In many security contexts, the use of yksittäisavaimet for individual doors or pieces of equipment ensures that access is restricted to authorized personnel only. If a single key is lost or compromised, only that specific lock needs to be rekeyed or replaced, minimizing the overall security risk and the cost associated with rekeying a larger system. This makes yksittäisavaimet a common and practical solution for securing individual spaces or items.