Profile: Laser-grader Mfg. markets manually driven, diesel powered compact graders that steer conventionally and articulate to turn in a 9 foot turning radius. Our Laser-Grader® model 106-6WD comes equipped with a Trimble® grade control system. Our automated grade control packages include conventional lasers, which use 2 receivers to follow a laser signal and sonic tracing which use the sonic tracer to follow a string line, curb or existing grade.