This an end stop that can be used for the X Y And Z axis, The nice thing is it slides and attaches directly to the conduit. Use 2 16 mm #3 screws to attach the limit switch.

The limit switches can be purchased from amazon here.
http://www.amazon.com/gp/product/B00DN7Z67E?psc=1&redirect=true&ref_=oh_aui_detailpage_o09_s00

Things were a little tight where the conduit locking nut go's was, not able to fit the m3 nut but the screw gos in just fine the print is designed to be a little tight so every thing works great even without the second m3 nut.