This tool like the card only works on one side of the door. But unlike the card it works on the side of the door that has the sloping side of the latch facing away from you.
This dose not work on doors with deadbolts.
This tool is made of a paperclip and 3 twist-ties.
Disclaimer: THIS SHOULD NOT BE USED TO BREAK THE LAW
On a side note, I apologize for any spelling errors/wrong use of words. Spelling and spell check are two things I can't seem to get a good grasp on.
Step 1: How It Works
The wire loop is pulled down on the sloped part of the latch. The latch moves in order to allow the wire to move down. When the wire reaches the end of the latch the door can be opened but only in that instant.
Step 2: What You Will Need
(3) Twist ties - you can use any number you like but 3 is good for this length of twist tie. You can find these at any walmart or on some packages of bread, etc.)
(1) Paperclip - easy to find.
(1) Source of fire
(Optional) Pliers - not needed but makes the end product look better
Step 3: Preparing the Twist Ties
When you burn the twistties try to hold them in the air (maybe with pliers), There is a plastic residue that falls off them as they burn and if you leave then on something while they burn it will stick to them.
Step 4: Tieing the Twist Ties
Cross the wires as seen in the picture below
Wrap the end of the wire on the left back around and over the on on the right and vice versa.
Leave some wire untwisted. Bend the leftover wire up and back on top of the twist on both sides.
Repeat by attaching 3rd wire to the end of the second.
Step 5: Making the Handle
Curl ends of the paperclip as seen in picture blow to make hooks
Tie wire to one of the hooks. I tied it on by using a loop and then twisting it but there are many ways to do it.
Step 6: Using the Tool
Orient the tool so the hook with the wire on it is facing up and bend the wire into a "U"
Put the wire in the crack between the door and its frame above the latch
Bring the wire around the back of the latch and out of the crack below it
Tie the wire to the other hook
Move the wire along the latch so it is as far toward the frame of the door as it can go
Pull on the wire while steadily pulling (or pushing if your door opens the other way for some reason) the door knob. You may need to move the wire around a bit until it seats.
It may require a lot of force on the wire to move the latch, but if the tool is about to break your putting to much force on it and should try to re-seat it instead.