This is a Micro-Mini-Tiny Shapeoko Limit Switch, I have tons of these switches lying around but could not find a proper mount for them so here it is. The switch is 12.80mm x 6mm x 5.7mm.The the mount clips onto the shapeoko endplates but then you must either use a m1.6 screw or glue 1.75mm filament, cut to size, to hold the switch in place.I did print these with supports and left them in for added rigidity. If you find the clips are bowing and running into the slide you can bend the ends in for a tighter compression and then snap them in quickly so they don't bow out too much