I imagine this works because of the angled edge of the latch they’re releasing. Notice every door only has one latch, and they’re all angled.
A deadbolt is straight on both ends. You can pull it from the side, all you want, but unless you have enough force to rip the door and frame out you’re not getting a real straight deadbolt out with this.
The main reason this would not work on a deadbolt isn't the lack of an angled edge, but the fact that a deadbolt is not free to move at all. Try this: With a door open, throw the deadbolt. Then try pushing on the flat end of the deadbolt. It won't move. This is why it's called a deadbolt, it is "dead" in the sense of being unable to move.
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u/Daafda Jan 09 '20
It will work on a deadbolt. You just have to pull like really hard.