When it comes down to it, the Defendius door chain has no viable function beyond that of a typical door chain but it looks awesome. In place of the usual horizontal slider, there’s a maze of chain holder that you need to navigate before you reach the other side and can open the door. Ordering a pizza and escaping during a fire will soon become distant memories, especially if you’ve had a few mind altering drinks earlier in the evening.
Let’s be blunt it probably doesn’t improve security in the slightest. After all, a chain is designed in such a way that people can’t get in – the door only opens a crack, in theory, so that the person on the other side can’t fit their arm through anyway. Adding the maze is purely for the enjoyment of those indoors.
I know you’re probably mocking the chain right now, but I bet that at the same time, you’re also quickly trying to work the maze out too. Realistically, it’s not the most challenging of mazes but imagine the look on guest’s faces when they try to leave. You might also want to invest in an intercom so you can let visitors know that you might be a minute answering the door.
Unfortunately, it’s more of a signature piece possibly created as a joke, by Art Lebedev Studio. It was, after all, announced on April 1st. However, I’m fairly sure that if you really looked around you’d find one for sale somewhere.