key
instrument that is used to operate a lock
fire brigade key
standardized keys for use in areas needed to be quickly accessed by emergency services
Berlin key
Type of door key
master key
key designed to operate multiple locks
token
railway signalling technology
Palestinian key
Palestinian symbol of homes lost in 1948
Euro key
universal key for public toilets
smart key
electronic access and authorization system
key fob
RFID transponder for locking systems
car key
key used to open and/or start an automobile
zoo key
novelty key used at American zoos
key blank
uncut key