Abstract: An anchor used in concrete construction serves both as a bar termination and as a transition or starter bar anchor for use between pours or at forms for poured-in-place construction, or at the surfaces of precast elements. The anchor includes a core and is of relatively short axial extent, which has substantial peripherally continuous deformations which provide a large area bonding surface relative to the diameter or area of the core. In a preferred form, the increased bonding surface area is created by a circumferentially continuous flute or ridge which has a substantial height relative to the core. In a preferred form, the ridge is the form of a continuous helix. The height of the rib is preferably about ⅓ the axial spacing or pitch. The core includes bar sockets at one or both ends which may be designed to accommodate bar ends for a variety of mechanical connections, although tapered thread connections are preferred.