The major connector is either a lingual bar or a sublingual bar. An embrasure clasp is viewable on the device's left half, as well as two cingulum rests for the two canines on the mandible.
Their mouth is Kennedy classification II RPD as evidenced by the unilateral row of teeth on the right side of the denture. The images above show the same Removable Partial Denture (RPD) for a patient whose mandible is partially edentulous.