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.

Bolt operated by key both sides BC500 Series Auxiliary and primary locking for commercial and residential buildings Grade 2 Exposed trim: wrought

SCHLAGE B562P DOUBLE CYLINDER DEADBOLT ADJ BS SC1 SATIN CHROME

What Is a Double-Cylinder Door Lock?

Getting Smart With: Deadbolts - Beacon

460 Series

LOCKWOOD L001-1K1SPDP DOUBLE KEYED DEADLOCK SATIN PEARL

Gatehouse And Iron Gate Interlocking Double Key Deadlock

Dead bolt - Wikipedia

Kaba Ilco Auxiliary Lock, Jimmyproof Deadlock, Bronz, Cylinder: Double 535-53-51

Gatehouse And Iron Gate Interlocking Double Key Deadlock

MUL-T-LOCK MTL600 Hercular Double Cylinder Deadbolt (decorative style) @

Schlage BR262 Double Cylinder Deadlock KA3 Antique Brass 3 PACK – AnnesHardwareSurplus

Double-Keyed Deadbolts

Replace a Broken Deadbolt Lock and Keep Using the Original Key