Abstract: An anchor rod for insertion in a fastening matrix such as a concrete structural element, by means of a hand-held percussion drill, has a smooth mid-section of slightly reduced diameter just below a slightly thickened intermediate collar that separates it from threading at the external end of the rod and has a profiled ridge and groove section at its insertion end which has a lefthand twist for insertion with a righthand rotation, as well as a frustoconical flat tip. The profiled section increases in diameter gradually towards the tip. At least the profiled section is manufactured by cold deformation with flat ridge tops having minutely burred or beaded edges.