Limit Switch for MPCNC. Mounts on 1-inch EMT. Split design for easier post machine assembly mounting and adjustment. Uses 4-40 x 1/2 pan head hex screws and nuts. Designed for microswitch ZMA 03A150L04PC from DigiKey at $0.79 ea. I used 2-56 screws to hold switch. I drilled out the plastic with #49 drill which let the switch mount screws self tap. The switch was designed for a 1-64 screw, but a 2-56 will screw through.