What is a Deadbolt?
A deadbolt is a security device that is installed on a door to prevent unwanted intrusion. Home security is a prime concern for most homeowners, and a deadbolt lock can provide a good amount of protection from trespassers. The bolt cannot be pried open, as with a spring-loaded lock. Deadbolts are also called deadlocks. There are two basic designs, the double cylinder and the single cylinder. The double cylinder bolt can be locked from either side of the door with a key. The single cylinder bolt uses keyed entry outside, but needs no key to open from inside the room. The double deadbolt cylinder is more secure, but the single cylinder provides a convenient and safe way to exit without a key. There are several different styles of bolt locks, each made for a specific function. A style often seen in public buildings is the exit-only latch, commonly used to provide a safe fire exit. When entering from outside, a key is required; however, pressing a bar or handset on the inside of the door c
