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.

Holmes Building Materials

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

LOCKWOOD L001-1K1SPDP DOUBLE KEYED DEADLOCK SATIN PEARL

Double keyed Deadbolt Lock - Keyed on Both Sides, 2-Way Adjustable Cylinder Deadbolt (Privacy/Passage), Satin Stainless Steel(Black, Double Side)

SE 19326 - Bronze Deadlock, 687A, Double Cylinder, Flat Strike, Brass

Mul-T-Lock Hercular Double Cylinder Deadbolt HD2 - E.D. Locks & Security LLC

Choose 31/32 or 1-1/8 Backset Backset: The distance between the edge of the door and Center of the key cylinder. Huge five-ply laminated steel bolt

Pacific Doorware AR Rite Style Door Lock Mortise Deadbolt & Double Keyed Cylinder Set, in Duronotic (1-1/8 Backset)

Lockwood 355 Double Cylinder Deadlock Satin Chrome Pearl 355NSP

Is It Possible to Install a Double-Sided Deadbolt In A House? - Realty Times

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

Gatehouse And Iron Gate Interlocking Double Key Deadlock

LOCK & KEY S205 DOUBLE CYLINDER DEADLOCK SATIN CHROME

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

Satin Nickel Key Control Deadbolt - Keyed One Side - featuring SmartKey

7 Lever Deadlock With Keys Stock Photo - Download Image Now - Advice, Bolt - Fastener, Burglary - iStock