Five models of construction machinery, a simple excavator and four motor graders with different designs, two cabs with different designs (one closed and one open cabin which includes a seat and a steering wheel and gear levers or whatever), two designs of engines (one closed and one with the engine in sight with some details).
STL (Stereolithography, filesize: 53.9 MB), OBJ (OBJ, filesize: 72.4 MB)