Abstract: A dual beam concentric polar axis scanning machine for allowing flat parts to be easily scanned and measured. Flat shaped parts are placed on a glass datum type part support surface. The dual beam laser type scanners are positioned on a motion stage beneath the part support surface and move in the x and y planes parallel to the part support surface. Detectors above the surface receive the beams and move in unison with the scanners. Initially, the beams trace the external outline of the part and measure all grooves, side indentations and the like. Next, the beams pass over the surface of the part locating and mapping the locations of any openings therethrough. Finally, the beams trace perimeter edges of each of the openings for their measurements.