Created using the OpenSCAD script by drkow, this version has been ruggedized by reinforcing the mounting hole to eliminate breakage. It is designed to fit 8mm smooth rods.I use 3 of these per MendelMax 1.5 printer.If your specific endstop requirements are different from those used in this object, I recommend downloading drkow's OpenSCAD script and playing around with the values to get exactly what you need.