Final answer:
Key-operated locks that are built into the door or container they are securing are commonly known as deadbolts.
Step-by-step explanation:
Key-operated locks that are built into the door or container they are securing are commonly known as deadbolts. Deadbolts are a type of lock that is operated by turning a key to move a metal bolt into a strike plate, providing enhanced security to the door or container.
Deadbolts are typically found in residential or commercial buildings to provide an additional layer of protection against unauthorized entry. They are known for their strength and durability, making them an effective choice for securing doors and containers.
For example, many front doors of houses have deadbolts to provide added security in addition to regular door locks. Similarly, safes and storage containers often feature deadbolts to protect valuable items.