<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
Why are certain types of door locks called 'deadbolts' ?<|im_end|>
<|im_start|>assistant
A deadbolt is a type of locking mechanism that is installed on doors to provide an additional layer of security. Unlike regular door locks, which typically use a spring-loaded latch bolt that can be easily manipulated, deadbolts use a solid metal bar that extends into the door frame, making it more difficult for intruders to force open the door.

The term "deadbolt" is believed to come from the fact that the locking mechanism is "dead" when it is not engaged, meaning that it is not spring-loaded like a regular latch bolt. Instead, the deadbolt is locked and unlocked manually using a key or thumb turn, which moves the solid metal bar in and out of the door frame. Because of this solid bar, deadbolts are generally considered more secure than regular locks and are often used as a secondary locking mechanism in addition to a standard lock.<|im_end|>
<|im_start|>user
Do deadbolts have any negatives? Why don't all doors have deadbolts, if they are this much safer?<|im_end|>
<|im_start|>assistant
While deadbolts provide additional security compared to regular locks, they do have some potential downsides. One potential drawback of deadbolts is that they can be more difficult and time-consuming to operate, especially in emergency situations where quick exit is necessary. Additionally, deadbolts may require professional installation or modification to the door, which can be an added expense.

Not all doors have deadbolts for a variety of reasons, including cost, ease of installation, and personal preference. Some homeowners may feel that regular locks provide sufficient security, while others may prioritize convenience over added security. Ultimately, the decision to install a deadbolt or not depends on individual needs and circumstances.<|im_end|>
<|im_start|>user
What are the different types of deadbolt locks?<|im_end|>
<|im_start|>assistant
There are many  types of deadbolt locks, including:

1. Single cylinder deadbolts: This type of deadbolt lock is the most common and features a key cylinder on the outside and a thumb turn on the inside to lock and unlock the door.
2. Double cylinder deadbolts: These deadbolt locks feature a key cylinder on both sides of the door, which provides additional security but can also be a safety hazard in case of a fire or emergency.
3. Keyless deadbolts: These deadbolt locks are designed to be operated without a key and typically feature a keypad or touchscreen that allows users to enter a code to lock and unlock the door.
4. Smart deadbolts: These deadbolt locks can be operated using a smartphone app, voice command, or other smart home devices, providing remote access and control.
5. Jimmy proof deadbolts: These deadbolt locks are designed to prevent the door from being forced open by wedging a bar between the door and the door frame, making it difficult for burglars to break in.<|im_end|>