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 Are Deadlocks, Deadlatches & Deadbolts (& Why You Need Them)

Removing a double keyed deadbolt without screws

3100 Series Grade 1 Deadlocks Heavy Duty Commercial Double Cylinder (ANSI E2141) - Deadbolt thrown or retracted by key from either side. Bolt

Hager Grade 1 Deadlock Double Cylinder Satin Chrome 2-3/4 BS Standard Strike - 3114-234-US26D-NC-KD-3930

High Security Aluminum Deadbolt Gate Locks with cross star keys

Double throw latch deadlock - Gatemaster Locks

Key Deadbolt Lock Both Sides, Double Keyed Deadbolt Lock, Keyed on Both Sides, Jimmy Proof Deadbolt with Keys, Right-Handed Security Night Latch Lock, for Doors from 1-1/2'' to 2-1/5'', Dark Green

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

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

How to Install a Deadbolt in 4 Easy Steps - Bob Vila

NUSET jimmy-resistant double cylinder deadlock painted in bronze is a classic solution to secure your doorway. Painted in bronze. The deadbolt is

Double Cylinder Deadbolt

Double Cylinder Deadbolt

Double Down on Home Security with Kwikset Double Cylinder Deadbolts - Kwikset Locks: Smart Security Blog

BiLock Grade 1 Double Cylinder Deadbolt :: Deadbolts :: Door Locks :: Security Snobs

Single and Double Cylinder Door Locks

Which is Best — Single or Double Cylinder Deadbolt Locks?