It is a shrouded - 4 wall design with a latch holder fastening, meaning the mating receptacle clicks and locks — you should hear it seat.
At 2.50 mm pitch, this header matches the Signal Double Lock receptacle family. The kinked pin solder termination provides through-hole retention during wave solder.
Latch holder and shrouding for vibration
The latch holder fastening is the standout feature — it locks the mating receptacle positively, so the connection won't back out under vibration or cable strain.