Abstract: The invention is concerned with an anchor and coupler unit for use with stressing cables in reinforced concrete structures. The unit comprises a base plate having an aperture therethrough and supporting a cable anchor the body of which includes an external surface curved convexly towards the socket base and spaced apart therefrom and adapted to receive a looped end of a reinforcing cable wherein the body is preferably separate from the base plate and the latter in the form of a socket which has a peripheral flange extending towards the cable anchor body and a conical housing around the aperture extending on the opposite side of the plate to the flange. Also the anchor preferably has a pair of oppositely extending semi-cylindrical projections each providing a curved surface spaced from the base plate.