This handy 2x20 IDC Box Header is the matching connector for our 40pin GPIO ribbon cable. By soldering this onto perf board you can run a GPIO cable from your Pi A+/B+/Pi 2 to the socket.
This socket only works for the Raspberry Pi Model A+/B+/Pi 2 GPIO cables. It does not work with the Raspberry Pi Model B GPIO cables. It is just the socket.