Door Angel - Lock-A-Bolt Door Bolt Security
thingiverse
I decided to model this based on pictures, as I don't own one. The oval part (Restrictor) can be attached to your door using strong double-stick tape for a quick fix, or screwed into the small screw hole with a tiny screw for a more permanent solution. You'll find a video demonstrating how it works at https://www.youtube.com/watch?v=YxcTrV_RXy0. UPDATE: I've put this to the test and it works flawlessly! It's virtually impossible for anyone to pick your deadbolt lock using a key or those specialized devices designed for unlocking deadbolts.
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