This adapter board is designed to make it easier to use ARM dev boards that use slimmer 2x5 (0.05"/1.27mm pitch) SWD cables for programming. It's helpful for using products like the JTAGulator, STLink or SEGGER J-Link with tiny boards that use the 10-pin SWD programming connector, often Cortex M0 or M3's. https://elecena.pl/product/17500651/swd-2x5-1-27mm-cable-breakout-board 2021-04-06 https://elecena.pl/product/17500651/swd-2x5-1-27mm-cable-breakout-board 2021-04-13