An opto endstop holder to secure the endstop board to 10mm linear rod. I have designed this holder to suit my modifications to Adapto parts but can be used as needed on any project. Adapto is a simple straight-forward 3D printer build and can be found at https://github.com/rotorit/Adapto OR http://reprap.org/wiki/Adapto If you like what you see please feel free to leave a tip: http://modernwebsitesolutions.com/resources/tipjar.html