Shutter Stopper

Recently a friend told me about his boy pulling to high his rolling shutter and that the vendor did not have the right stopper. Finally he asked me if I had any idea on how to fix something on the chain in order to prevent the shutter from going up to high. Of course I had ... ;-)

Stopper   Stopper   Stopper   Stopper

 3D model [STL] [GCODE]