Overall length is about ~8" or ~200mm

I saw something similar online in a video being used by a penetration tester and I wanted to try it for myself to see if I could open any of my own doors with it. If a door is installed properly, it can't be opened with one of these, however, if it is not installed correctly this tool can be used to slip a latch (not a deadbolt). I changed the design from the one I saw to allow for better printing and added a lanyard loop, the critical dimensions are the same however. There are 2 versions of this tool in the .3mf, one is 2mm thick the other is 3mm. The thicker one will hold up better, but the 2mm fill fit more doors. Either way it doesn't take long to print and doesn't use much filament. You can turn off ironing if you want a shorter print, however the smoother the surface the better the tool will work.

Alternatively, you can use this as a template to cut one out of sheet metal.  

I also have some small wedges that can be printed and used to open the door frame gap that you can find here:

[https://makerworld.com/en/models/691021#profileId-619739](https://makerworld.com/en/models/691021#profileId-619739)