Gravely Pro 16 walk behind, Kubota BX2230, Kubota B26TLB
Our county trucks in northern Michigan have those grader blades for snow removal and for grading dirt roads in the summer. But they are a fixed length, no extending wings. Local county had a pickup for sale years ago that had the grader blade under it. Jon
Wausau makes a blade that is intended for snow, but can be used for light gravel grading as well. They are common on airport snow plow trucks. Most of the Oshkosh WT2200 USAF plow trucks had them.