From first pass to finish grade, find out how Cat GRADE with 3D for dozers can help you get to grade faster, more accurately and with less operator effort. This factory integrated option helps experienced operators work more productively over long shifts, and helps operators who have less grading experience produce smoother grades in a shorter period of time. Cat GRADE with 3D is available on Tier4 Final/Stage IV D6N, D6T, D8T, and D9T dozer models.