This board allows you to use Xiao/QTPy form-factor boards with a breadboard (and more) without having to solder the boards in place. All you need are FlexyPins!
It's a great way to create testing/flashing jigs, or just experiment with the boards without the commitment of soldering headers to it.
A soldering guide is available here: https://www.youtube.com/watch?v=VZVIUo6SYR0
We usually package the orders during the weekend and drop them off on Monday.