Remove this screw using a drill or screwdriver.
Remove sliding door lock without key.
How to remove a door lock without a key.
Use the flat head screwdriver to turn the spindle in the center of the door lock cylinder counterclockwise until it stops.
Pull the door up until you can see the bottom wheels on either side.
Look for a small set screw at the base of the handle.
To remove a sliding screen door find the screws at the bottom corners and unscrew them with a screwdriver.
Open the door and look for the latch plate along the door s edge.
Block the door from the inside by stuffing a sock or a similar piece of fabric under the door.
Tilting the door lowers the latch releasing it from the bracket.
Even a shoe or a slipper can work if the gap is large enough.
Then use your screwdriver to unscrew the head stop located at the top of the door frame.
So in order to unlock a door without a key you will have to imitate the action of the key itself.
The basic pin tumbler lock should work ideally with only one key.
The cam can be manually pushed to unlock.
You need to use a relatively thin metal tool to slide between the round part of the key cylinder and the front of the mechanism and lift the tool to raise the cam unlocking the lock.
The l shaped latch on the door connects with the bracket typically pivoting up from the bottom to lock the door.
At this point the square tab on the spindle is aligned with the square.
But there are other methods that can be used to secure a door without a lock such as door wedges and alarms.
Careful of sparks on the glass as they tend to stick.
Insert a screwdriver or pry bar between the door frame and the door about 6 inches from the corner diagonal from the latch at the bottom and pry upward.
A whitco tasman mark ii security door lock uses a loose cam profile cylinder.
To accomplish this you can either make use of raking or single pin picking.
If you have plenty of time then drill away if you have a small grinder cut the face of the the cylinder off as close to the door face first.