What is another word for safety bolt?
Pronunciation: [sˈe͡ɪfti bˈə͡ʊlt] (IPA) 
A safety bolt, also known as a deadbolt or a latch bolt, is a lock that provides an added level of security to keep buildings and homes safe from break-ins and intruders. Other terms which are commonly used in place of safety bolt include night latch, dead lock, and security bolt. Night latches are designed to be fixed on the door's inside while dead locks are mortised into the door edge. Security bolts, on the other hand, are commonly used on double-entry doors to keep the second door from opening. Regardless of the term used, safety bolts are essential to home and property security.
