JTAG (2×10 2.54mm) to SWD (2×5 1.27mm) Cable Adapter Board: – This adapter board is designed for adapting a ‘classic’ 2×10 (0.1″/2.54mm pitch) JTAG cable to a slimmer 2×5 (0.05″/1.27mm pitch) SWD Cable.  It’s helpful for using products like the JTAGulator or SEGGER J-Link 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 2×10 cables