What Is a Double Key Deadlock?

Is adding a double-cylinder deadbolt to an exterior door a good idea? Find out about the pros and cons of adding double-keyed deadbolts vs. single-keyed deadbolts to exterior doors for safety and security. Deadbolts with two keys pose unique challenges.

What Is a Double-Cylinder Door Lock?

Lockmasters. Arrow E Series Double Cylinder Deadbolt; Satin Chrome

The 9 Best Deadbolts of 2023

Replacing double-keyed deadbolt with turn lever : r/Locksmith

Double Cylinder Deadlocks - Residential - I Dig Hardware - Answers

DSO0703 Door Hardware

MUL-T-LOCK MTL600 Hercular Double Cylinder Deadbolt @ MUL-T-LOCK

Commercial Deadbolts

Kwikset Deadlock Double Cylinder Lock With 2 Keys 665 RCL-RCS4 US3 Polish Brass