This is the lower clip-on dust shoe for the Makita tool mount on a V1 engineering lowrider v3 CNC router. It has been extended 10mm taller to improve dust collection (potentially at the cost of that 10mm of Z axis travel). The clip on part has been made tighter so it is a firmer grip when clipped on, and doesn't hang down leaving a gap and rattle around.
The author remixed this model.