What Is a Double Key Deadlock?

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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.

RELIABILT Stainless Steel Double Cylinder Deadbolt in the Deadbolts department at

Medeco 11-0202-05-00 Bright Brass, Double Cylinder Tubular Deadlock Deadbolt Key On Both Sides 2-3/4 Backset, 00 Keyway HIGH SECURITY

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

Product Features: The deadbolt operated by key on both outside and inside; Material: Stainless Steel + Iron; Adjustable Backset - 2-3/8 inch or 2-3/4

Double Cylinder Deadbolts with Key on Both Side, Keyed Entry Door Lock Satin Nickel Finish DLD102SN

Prime-Line Jimmy-Resistant Deadlock, Diecast, Brass Color, Angle Strike, Double Cylinder U 9972 - The Home Depot

Dead bolt - Wikipedia

How to remove a double cylinder deadbolt?

●Double Cylinder Deadbolts ●Same key in the same pack, different keys in different packs FUNCTION –Fits both right handed and left handed doors;

Keyed Alike Door Knob Combination Deadbolt in Polished Brass,Entry Door Knob with Double Cylinder Deadbolts Combo Pack.Entrance Function for

RiteFit Double Cylinder Deadlock. Lock & Key RiteFit Door Lock Rim Night Latch with Cylinder Brown ENL-FBDP. Anti jemmy deadlock with vertical locking