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- Provides maximum security on a door.
- Called “dead” because there are no springs to operate the bolt. It is only operated manually with a key or a thumb turn from the inside.
- The bolt locks the door to the frame and helps prevent someone from prying the door open.
- The throw is the length the bolt is extended from the lock housing.The industry standard is a 1” throw.
- Locks are designed to fit specific size holes and backsets. Backset refers to the distance between the edge of the door and the center of the handle.
- A single-cylinder deadbolt is operated with a key from the outside and with a turn button on the inside. It is used mostly with solid metal or wood doors.
- A double-cylinder deadbolt is operated with a key on both the inside and outside. It is best used on a door with glass in or around them as the style prevents someone from breaking the glass, reaching in and unlocking the door.
- Double-cylinder deadbolts can pose a danger during an emergency. If the key is missing or not readily available, people could be trapped inside a locked house. In some areas, codes may not permit this style of deadbolt.