3D Printing with Inserts

Advanced processes in 3D printing, such as inserts, core modeling, and multiple materials, can expand the capabilities of a 3D printer. Incorporating non-printed elements, such as fasteners, electronics, switches, sensors, or even metal substructures, into a printed part expands the spectrum of usability—resulting in fully functional models and prototypes. 3D Printing with inserts is a key advantage for using FFF 3D printing, as inserts are not practical with SLA, SLS, or Polyjet.

Source: 3dplatform.com