This is a small 3D-printed fix for when one of the internal black actuator pieces in a Niko 170-40050 fourfold 24V push button module breaks. Instead of replacing the whole module, this insert fits inside the front button cap without glue and is just long enough to bypass the broken actuator and directly press the switch underneath.

Designed to be a quick and functional workaround.
Tested on my own broken unit, fits snugly and restores functionality without modifying the original socket or requirement to replace the whole thing.