A flexible solid plastic torque transmitting insert component having a plurality of exterior lobes and a plurality of interior lobes, each exterior lobe having a selected first width and first and second flat sides, the distance between the respective ends of the flat sides of each exterior lobe defining the first width, each exterior lobe further having a perimeter comprising the first flat side leading into a first radiused corner, the second flat side leading into a second radiused corner, the radiused corners being connected by a central circumferentially disposed segment; and each interior lobe having a selected second width and third and fourth flat sides, the distance between the respective ends of the flat sides of each interior lobe defining the second width; the third flat side leading into a third radiused corner, the fourth flat side leading into a fourth radiused corner, the third and fourth radiused corners being interconnected by a central circumferentially disposed segment.