Begin by removing the screws from the door knob on the interior side of your door.
How to make a 2 way lock on a door.
Models are available with single and double cylinder functions.
For use in combination with a door knob lever lock.
Mark the center of the barrel hole on the edge of the door with an awl then mark center of the hole for the deadbolt on the face.
Not being able to wait for shipping i improvised using a bit of kitchen hardware.
Electronic door locks use an electronic keypad instead of a key.
After a bit of research i found a device in which you can use the door latches hole.
A secure entry starts with a solid door and a grade 1 or grade 2 deadbolt with a solid 1 in.
Designed as extra security for exterior doors.
Long throw bolt see buying a deadbolt.
Remove the two screws from the latch plate on the edge of the door and remove the latch from the opening.
A sturdy screwdriver or small pry bar can quickly bow the doorjamb enough to release the latch.
Check all exterior doors.
Most external doors are pre drilled for deadbolts making installation easy.
This allows you to pull the door knobs off the door from both sides.
Twist to lock deadbolt lock keyless twin lock keyed alike with 10keys lathe finish after 304 stainless steel casting front door lock single cylinder deadbolt and door knob with keyless locking design.
In some cases door latch plate mortises might need to be cut or enlarged.