Cat 150 Motor Grader Diecast Model. Diecast Masters "High Line Series" diecast vehicles feature Diecast Masters High Line Series 85667. Cat 150 Motor Grader 8" 2". Cat 150 Motor Grader. Used by contractors, municipalities, and public works agencies, the Caterpillar 150 has earned a reputation for dependable performance, durability, and effectiveness in a wide range of grading tasks.