Abstract: A tool for facilitating the height and depth placement of electrical outlet and junction boxes during rough construction comprises an elongated extruded support member having a rectangular or square cross-section and approximately five feet long. The rear surface is a plane for placement against the front surface of a stud on which electrical outlet boxes are to be placed. The front surface has a slot in it and box locator devices are slideably attached in the slot, so that the vertical height of electrical boxes to be attached to the stud is established by an initial adjustment of the box locator devices. Each box locator device further includes a box spacer extending on the sides of the support member ot establish the depth to which the box is located on the stud; and a spring is used to releasably hold the box in place against the spacer.