What Is a Double Key Deadlock?

Double Cylinder Deadlocks - Residential - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.

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

Interlocking Deadlock, Master Kwikset Keyed, Jimmy Proof, 2125 – NU-SET

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

LOCKWOOD L001-1K1SPDP DOUBLE KEYED DEADLOCK SATIN PEARL

Double Cylinder Deadbolt, View Box, Satin Nickel (US15) - Delaney Hardware

BRINKS. Double Cylinder Keyed Deadbolt Lock, Satin Nickel - Pick, Bump and Drill Resistant and Comes with an Anti-Pry Shield - Doorknobs

Deadbolt Vs Deadlatch: What Are The Key Differences

Schlage B62 Series Satin Nickel Double Cylinder Deadbolt Certified Highest for Security and Durability B62.N.G.619 - The Home Depot

Deadlock

High Security Aluminum Deadbolt Gate Locks with cross star keys