Double DIN rail keystone holder

I was using standard Keystone holder in my switching cabinet. They all had several drawbacks:

- They were flimsy
- Keystones were hard to get in and even harder to get out
- They only held one keystone
- They were expensive

So I designed an alternative that fixes all these issues. The result is a cheap to print, extremely rigid keystone holder that can hold two keystones.

Keystones easily snap in, and can be extracted with a standard screwdriver. You need to snap the lower keystone in first.

You can (and should) use a screwdriver to snap it to the rail.

Additionally I designed a hole for a M3 screw with a nut holder - this is a fallback mechanism if (and only if) the holder fails or gets too loose.

There is only one drawback: I was unable to squeeze it into the 18mm a "TE" usually has. It is exactly 20mm in width, so you can only fit 11 of those on one rail (instead of 12).


Thanks to mwu for his keystone receiver: https://www.thingiverse.com/thing:548145