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.

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

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

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Small Bore 2 Backset Double Cylinder Deadbolt

Gate Lock Double Cylinder, Schlage B252PD

YALE Double Cylinder 840 Key Entry Deadbolt Door locks, cabinet hardware, home alarms, custom doors, smart home products and custom doors.

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

Satin Nickel Double Cylinder Standard Deadbolt

Shop for the entrance function Cal-Royal Barrington Knob in Stainless Steel Finish directly at Door Locks Direct. Order door hardware and get free

Cal-Royal / Barrington Knob / Keyed Double Cylinder Communicating Lock / Stainless Steel / BA04-32D

What Is a Double-Cylinder Door Lock?

MUL-T-LOCK MTL600 Hercular® Double Cylinder Deadbolt