This is an extremely compact 2x5 pin male PTH header. It's a popular choice for JTAG applications. The pins are spaced 1.27mm apart and can be trimmed down if needed.

To use this header, you simply connect it to your circuit board according to your JTAG application requirements. When handling it, be gentle to avoid bending the pins. If you need a smaller size, you can carefully cut it down. To keep it in good condition, store it in a dry and clean place away from dust and moisture. Avoid exposing it to extreme temperatures as this may affect its performance.