Cat RM500 Putting in Work in DFW When the job calls for a real mixer, the Cat RM500 gets after it. Our Caterpillar RM500 is on the jobsite and working. If you’ve got a soil stabilization, reclamation, roadwork, or site-development project in DFW, give me a call. Star Tractor rents heavy equipment throughout the Dallas-Fort Worth Metroplex. Call me at 817-733-3799.