Check all exterior doors.
How to make a 2 way lock on a door.
For use in combination with a door knob lever lock.
Remove the two screws from the latch plate on the edge of the door and remove the latch from the opening.
This allows you to pull the door knobs off the door from both sides.
After a bit of research i found a device in which you can use the door latches hole.
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.
Long throw bolt see buying a deadbolt.
Lock a door without a lock.
Any exterior door that only has a lock in the doorknob isn t secure.
A sturdy screwdriver or small pry bar can quickly bow the doorjamb enough to release the latch.
Most external doors are pre drilled for deadbolts making installation easy.
In some cases door latch plate mortises might need to be cut or enlarged.
Begin by removing the screws from the door knob on the interior side of your door.
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.
Designed as extra security for exterior doors.
Models are available with single and double cylinder functions.
I needed to lock a toilet door from the inside the other day and there was no lock.