The Ultimate Chain Lock for Your Door

They call it the Defendius. This chain lock for your door may be the coolest looking one ever made, but it is not the kind of thing you want to have to undo in a fire. Take a look and see if you can figure out the secret to opening this door. And no, bolt cutters are not the solution.

Here’s the team that made the door possible:
art director
Artemy Lebedev
designer
Oleg Morev
industrial designer
Konstantin Chirkov
modeler
Alexei Zalata
visualizator
Dmitry Dolgikh
manager
Vera Dorofeyeva