A pin tumbler lock generally has the greatest delay factor among the options listed. This is because pin tumbler locks are designed with multiple pins and require precise alignment of these pins to open. This complexity provides a significant barrier to unauthorized access attempts, such as lock picking or manipulation.

Why Pin Tumbler Locks Have the Greatest Delay Factor:

Mechanism Complexity:

The lock uses a series of pins and springs that must align perfectly with the shear line to open.

Manipulating the lock without the correct key is time-consuming and requires specialized tools and skills.

Security Features:

Many pin tumbler locks incorporate additional security features, such as anti-pick pins or hardened cylinders, further increasing resistance to tampering.

They are widely used in residential, commercial, and high-security applications due to their effectiveness.

Evaluation of Other Options:

B. Warded:

Warded locks use simple obstructions (wards) to block improper keys.

These locks are relatively easy to pick using skeleton keys or other tools, providing minimal delay.

C. Lever:

Lever locks use levers to control the locking mechanism.

While more secure than warded locks, they are less complex than pin tumbler locks and can be bypassed more quickly by skilled individuals.

D. Disc tumbler:

Disc tumbler locks rely on rotating discs, offering moderate security.

These are often used in furniture or utility locks but are generally easier to pick than pin tumbler locks.

Best Practices in Lock Selection:

Assess Security Needs:

Choose locks with the appropriate delay factor based on the level of security required for the application.

Use High-Security Features:

Opt for pin tumbler locks with anti-pick, anti-bump, or drill-resistant features for enhanced protection.

Combine with Other Measures:

Complement locks with additional physical security measures, such as alarms or surveillance, to improve overall security.

ASIS CPP® References:

Domain 3 (Physical Security): Emphasizes the importance of selecting appropriate locking mechanisms to delay unauthorized access and enhance overall physical security.

Lock Selection and Testing Standards: Highlights testing for delay, resistance to manipulation, and durability.