This adapter board is designed for adapting a 'classic' 2x10 (0.1"/2.54mm pitch) JTAG cable to a slimmer 2x5 (0.05"/1.27mm pitch) SWD Cable. It's helpful for using products like the JTAGulator or SEGGER J-Link (Adafruit links. open in new window) with tiny boards that use the 10-pin SWD programming connector.
This board comes with no cables. It's really just the adapter - but is super helpful when you want to use JTAG debugging on boards that can't support 2x10 cables. We do stock the SWD cable if you need one here!