Abstract: A plurality of flat templates, each of which has the outline of an electric outlet box cut therein. A pair of slot-like openings are also cut in the template for weaving the template onto a wallboarder's square, or a carpenter's square. The template slides along the long member of the square to position and install the outlet boxes according to the building specifications. The template is then used to accurately position the corresponding cutout openings in the corresponding wallboard, sheeting or paneling. The apparatus can also be used to install ceiling outlets, and to accurately position the corresponding cutout openings in the ceiling wallboard, sheeting or paneling.