The 0.100" (2.54mm) pitch matches the common footprint for board-to-board or cable interconnects, and the breakaway design lets you snap to a shorter length if the BOM calls for fewer positions.
Gold Mating Surface, 5 A Contact Rating
The mating contact finish is gold at 3.90µin (0.099µm) thickness, which handles repeated mating cycles better than a tin finish — expect reliable signal contact through dozens of insertions. Each contact is rated 5 A, and the brass square pin construction gives a solid mechanical connection in the mating receptacle.