They can also be used as the primary locking mechanism on patio or balcony doors.
How to install double cylinder door lock.
Replacing a euro cylinder or upvc door lock a simple guide from www fastkeys co uk additional info step 1.
For safety reasons if you choose a double cylinder deadbolt make absolutely certain your family knows where the key is and leaves it there.
Open front door to reveal the face of the lock.
Install the deadbolt lock about 44 inches above the bottom of the door.
Choose a position on the door for the lock.
Single cylinder deadbolts entry knobs and handlesets are operated with a key from the outside but do not require a key for locking or unlocking from the interior of the property.
Installation of a double cylinder deadbolt uses the same size and dimension of pre drilled door holes as a conventional single cylinder deadbolt does and it is installed using the same procedure.
Instead the door is locked or unlocked using a thumb turn style lever.
A double cylinder door lock is a type of security device primarily found on residential doors.
This is the easiest way to rekey your door if you re giving the cylin.
Calling a locksmith out for this how to install a deadbolt lock job will cost 150 or more but you can install a heavy duty deadbolt yourself in less than an hour for a third of the price.
You ll have to adjust the position a bit if you have a combination storm door so as not to interfere with the storm doorknob or lock.
If you re in a situation where you cannot or do not want to use a drill to install your lock there are a couple ways of installing an interior door lock without a drill.
For example if there s a window on or nearby the door think of sidelight windows.
This is a video on how to replace the key cylinder in a commercial storefront door.
If your new deadbolt has a concealed screw for the interior door knob consult the installation instructions for your specific lock.
These locks require a key to lock or unlock the door both from the outside and the inside making them a little safer in one regard.