Key (lock)

A key is a device that is uised tae operate a lock (sic as tae lock or unlock it). A teepical key is a smaw piece o metal conseestin o twa pairts: the blade, which slides intae the keyway o the lock an distinguishes atween different keys, an the bow, which is left protrudin sae that torque can be applee'd bi the uiser.

The pairts o a pin tumbler lock key, whiles referred tae as a yale-teep key