Abstract: The nail has a proximal driving-and a distal attachment-end-portion and intermediate portions of different shapes, resiliencies, lengths, non-uniform curvatures, bends and thicknesses, designed for driving it through the hollow of the fractured bone and for rotationally correctly resetting the bone in position with optimum ease and efficiency and for holding it fixedly reset until the fracture heals. A matching tool set for the temporary attachment of the proximal end of the nail for the driving, rotation and withdrawal of the nail operations is provided in a package with a plurality of nails of different sizes to be available instantaneously to the surgeon in an emergency.