What Is a Double-Cylinder Door Lock?

A double-cylinder door lock is a type of security device primarily found on residential doors. Homeowners often use these locks in conjunction with other types of security products, such as lever locks or handlesets. They can also be used as the primary locking mechanism on patio or balcony doors.

Single VS. Double Cylinder Deadbolts: Which to Choose?

CES High Security Double Cylinder Door Lock - REVERSIBLE - Made in Ger – Hartmann Tresore Online Shop

Mul-T-Lock High Security Double Cylinder Deadbolt Grade 1 – Reed Brothers Security Online Store

Schlage B-Series Aged Bronze Double Cylinder Deadbolt - Triple A Building Center

ANSI Grade 2 Certified, Double Cylinder, ANSI Function E0142, Schlage C Keyway

D231 Double Cylinder Deadbolt

Commercial Heavy Duty Deadbolt, Double Cylinder, UL Fire Rated, ANSI 2 – Hermes Hardware: Quality Tools, Best Prices

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Double Cylinder Deadbolt, Polished Brass (US3)

Step up to designer styles and superior security with Kwikset signature series products. Juno's elegant, traditional style blends perfectly with most

Juno Satin Nickel Exterior Entry Door Knob and Double Cylinder Deadbolt Combo Pack Featuring SmartKey Security

Adjustable Latch to fit 2 3/8 and 2 3/4 Backsets, Fits on 1 3/8 to 1 3/4 thick doors, Includes all Mounting Hardware, Matching Strike Plates

Cosmas Satin Nickel Double Cylinder Deadbolt

A double cylinder deadbolt is typically used on a front or back exterior door and is operated with a key from both the exterior and interior of the

NuSet Kwikset Keyed Double Cylinder Deadbolt (Oil Rubbed Bronze)

Brinks Double Cylinder Deadbolt in Satin Nickel

Premium Double Cylinder Deadbolt Lock Stainless Steel SC1/KW1

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

Individual keys:Each dedbolt with its own key. Not keyd alike. Different keys for security needs. This double cylinder deadbolt can be locked or

Probrico Satin Nickel Double Cylinder Deadbolt with 2 Side(Both) Keyed Round Modern Contemporary Deadbolt Door Lock for Interior and Exterior,1 Pack