The ‘flash-adapter-with-pogo-test-pins’ is intended to be used with pogo-pins in a standard multi-pin cable header. This clamp block allows usage of single-wire headers. The dual row one is for example for the Arduino ISP connector.
Stefan Riese's Flash Adapter:
https://www.prusaprinters.org/prints/122176-flash-adapter-with-pogo-test-pins
The author remixed this model.
This is a set of pogo-pin adapters to be used with Stefan Riese's Flash Adapter.