A method of attaching and aligning reinforcing bars includes providing a plurality of molded plastic clips having first and second parallel seats and a third transverse seat, all seats of equal size. A lower seat of a clip is pressed over a first reinforcement bar, then a second reinforcement bar is pressed into the upper seat to attach two bars of equal size in parallel. Another identical clip can be used to attach a third bar transverse to the first two bars, all the bars being of equal size.