It uses the industry-standard 0.100" (2.54 mm) pitch, so the board footprint is a straight line of 22 plated through-holes on that spacing — no keep-out for a shroud or latch. The through-hole solder tails are 0.128" (3.25 mm) long, and the overall contact length from the seating plane to the pin tip is 1.058" (26.87 mm), which gives a 0.830" (21.08 mm) mating interface. This is a board-to-board style header, typically used as the male half of a pin-and-socket pair on a motherboard or backplane.
The 110 V voltage rating is the working limit between adjacent contacts at the 0.100" pitch.