Keys

Metal objects used to lock and unlock mechanisms.

lock keys security keys

Keys are small, typically metal objects used to lock and unlock mechanisms such as doors, locks, or musical instruments. They work by fitting into specific keyholes and turning to engage locking mechanisms.

/kiː/

The word 'key' comes from Old English 'cyf', meaning 'lever, key'.

Keys are metal tools that fit into locks to open and close them, like how a special puzzle piece fits in just one spot.

The earliest known keys and locks date back to ancient Egypt, around 4000 years ago
Some modern cars use transponder keys that communicate with the car's computer
Skeleton keys were used in the 17th and 18th centuries

tool fastener

skeleton key master key car key

bit bow shank

lockset keyring

electronic device functional object mechanical device