What is a double cylinder Handleset?

Double Cylinder deadbolts, entry knobs, and handlesets require a key for locking and unlocking from both the exterior and the interior of the property. There is no thumb-turn mechanism on a double cylinder lock.

What does double cylinder lock mean?

While the single-cylinder deadbolt only features a locking mechanism requiring a key on one side, the double-cylinder deadbolt has it on both. This means that a key will be required to turn the lock both on the inside of the door and the outside.

What is a double deadbolt?

Double cylinder deadbolts are locks that require a key to open from both the inside and outside. On the other hand, single-sided deadbolts require key to unlock from the outside only. Single sided deadbolts have a knob on the inside that is used to unlock and lock them from the inside.

What is the point of a double lock?

The main advantage of installing double-cylinder locks is enhanced security. That’s because doors with adjacent windows or glass panels can be broken, allowing intruders to reach inside and unlock the door manually. This is a significant weakness in terms of commercial break-ins and residential burglaries.

Why would you want a double cylinder deadbolt?

Typically, businesses used double cylinder deadbolt locks because they provide more security on exterior doors with windows. When intruders attempt to break into a building through a window, the key lock on the inside of the door will stop them from entering.

Are double cylinder deadbolts legal?

In the U.S., there is no single comprehensive law against dual-cylinder deadbolts. Individual cities and states have local property and fire codes that may prohibit the use of dual-cylinder deadbolts. The code may prohibit the use of dual-cylinder deadbolts in some buildings and allow them in others.

Are double key locks legal?

Are double sided deadbolts illegal?

Are two deadbolts better than one?

Sometimes home and business owners assume that installing more than one deadbolt will make a door more secure. To put it more plainly, twice as many deadbolt locks does not equal twice as secure a door. Adding an extra deadlock only slightly increases the door’s resistance to being rammed in (i.e. kicked) by force.

How do you open a double lock?

Double doors – unlocking Double doors open and shut in a similar way to a single door. It is only the opening sequence that makes them different in that the main door needs to open first and close last to prevent them clashing. Turn the key one full turn away from the lock edge to unlock the latch and hook bolts.

Is a double cylinder deadbolt better than a single cylinder?

Double cylinder locks operate with a key on both sides of the deadbolt whereas a single cylinder lock can be locked from the inside by a thumb turn. Typically, businesses used double cylinder deadbolt locks because they provide more security on exterior doors with windows.

Can a double cylinder handleet be used on an entry door?

Interconnect devices are not compatible with double cylinder handlesets. The standard residential door prep for entry doors is two 2-1/8″ bore holes 5-1/2″ center to center. See measurement “B” in the image to the right. If you have more that 5-1/2 inches here you can still use a sectional handleset on your door.

What do you need to know about double cylinder locks?

What Is a Double-Cylinder Door Lock? 1 Features. Deadbolt on interior of home. 2 Uses. Burglars often go through windows if they see a double cylinder door lock. 3 Installation. Key and door lock. 4 Types. Secure deadbolt lock. 5 Warning. Fires in homes with double cylinder locks are a danger.

Which is more common single cylinder or double cylinder?

Single cylinder locks are more common than double, though that trend is starting to change. Single cylinder locks have only one lock cylinder, as the name implies.

Can a single cylinder lock be used on a deadbolt?

A single cylinder lock can be used on either a door handle or a deadbolt. These types of locks are operated with a key on one side. The other side is operated with a thumb-turn style lever. How Do Double Cylinder Locks Work?