Abstract: A rotatable retaining structure for flexible cutters for cutting vegetation and the like, having a hub, a plurality of arms extending radially outward from the hub and a guard disk disposed outwardly on the arms at a predetermined radial distance from the hub. The arms include slanted or cambered edges to create upward air currents to lift and pull the vegetation into the rotating flexible cutters. The guard disk may be weighted so as to simulate a flywheel for the motor shaft and has an additional air foil for disposing vegetation cuttings outwardly.