You get a steady feel with the Model 700-P400A1, and the connections line up just right.
OPC-K01 Receiver OPC IP65 12VDC Relay Wall Mount -10-55°C GORKE
The Songle brand gives me confidence, and the pins feel solid when you seat them in a breadboard.
A nice touch is how the NVX BIR500 model keeps the costs down while still feeling solid.