It's a through-hole board-to-board interconnect on the standard 0.100" (2.54mm) pitch, with square pins that mate into a wide range of industry-standard receptacles. The tin-plated contacts are rated for 5 A per circuit at 110 V, and the UL 94 V-0 black housing keeps it compliant for equipment inside an enclosure. This is a straightforward, no-frills header for when you need a specific pin count on a standard grid.
The 0.100" pitch is the classic BergStik / PC/104 grid — it's the footprint you expect for a standard IDC ribbon cable or a mating square-post receptacle. The 110 V rating confirms this is a signal interconnect, not a power bus.