Cylinder locks are among the most widely utilized and versatile lock types in both residential and commercial settings. These locks work using a cylindrical mechanism where a set of internal pins and springs match the distinct grooves on a key. The pins line up when the right key is entered, turning the cylinder and opening the door.

Cylinder locks come in various types based on their design, application, and functionality. Here are some common types:

1. Single Cylinder Locks

Operate with a key on the outside and a thumb turn on the inside.
Commonly used for residential doors.
Offers convenience, as no key is needed from the inside to lock/unlock.

2. Double Cylinder Locks

Require a key to operate from both the outside and inside.
Often used in areas where security is a high priority, as they prevent someone from unlocking the door through a broken window.
May pose a safety concern in emergencies as they require a key to unlock from the inside.

3. Euro Cylinder Locks

Popular in Europe, these locks come in single, double, or thumb turn versions.
Widely used in doors with multipoint locking systems.
The design allows for easy replacement of the cylinder without changing the entire lock.

4. Key-In-Knob Cylinder Locks

The cylinder is integrated into the knob itself.
Typically found on interior doors, such as bedroom or bathroom doors.
Less secure compared to deadbolt or mortise locks.

5. Rim Cylinder Locks

Typically used in conjunction with rim locks, commonly found on older or traditional doors.
Installed on the inside of the door with a cylinder protruding through the door for key access from the outside.
Popular in deadlock systems.

6. Mortise Cylinder Locks

Installed inside a pocket (mortise) in the door, making them highly durable and secure.
Often found in commercial settings or heavy-duty residential doors.
Requires a special door preparation and offers superior security.

7. T-Handle Cylinder Locks

Found primarily in vending machines, ATMs, and utility cabinets.
Require a special T-handle key to operate.
Provide a higher level of tamper resistance.

8. High-Security Cylinder Locks

Designed with advanced features such as drill-resistant housings, anti-bump pins, and anti-pick technologies.
Used in settings where maximum security is needed.
Often come with patented keyways, making it difficult to duplicate keys.

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