The mandibular mounting stand has two hole locations. The top hole is used for High (H) model articulators; the bottom hole is used for Low (L) model articulators.
The Mandibular Mounting Stand supports the articulator upside down to aid in mounting the mandibular cast. Inserting the Dyna-Link pins into the holes in the stand creates a solid support for the articulator. The front of the articulator can be adjusted with the support pin to level cast to prevent the mounting stone from sliding off the cast during the mounting procedure.