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. This board comes with no cables. It's really just the breakout board and some header if you need it - but is super helpful when you want to use JTAG/SWD debugging.