I recently got a Redkey USB because of a project to reload laptops for a donation. I was very impressed when trying it out, I ran into a few issues, but support was very fast to respond. Because of the great experience I purchase one.
Deployment of Redkey is easy.
Boot into the Redkey USB
Select 1 for Graphical or 2 for Text Based. By default, Graphical will be loaded once the timer ends.
Select a resolution
Select a Language
The all hard drives detected will wipe
Once done, you should see a summary.
In my testing, I try to recover any files using CCleaner Recuva. In the past, Recuva helps me recover files before. In my testing, Recuva was not able to recover any files. I ran Recuva multiple times, and nothing was found.
Here is a video demo:
I have my Redkey USB setup with a custom script to deploy my wipe configuration, below is the file.