You simply place the outlet over the tape run at the desired location and pound it in. The outlet nails are embedded diagonally, allowing the outlet to be mounted vertically regardless of whether the tape run is vertical or horizontal. By using a Test Probe to locate the tape run, the outlet can be installed even after wallpapering. Each outlet is constructed of tough, white plastic with tapered edges to achieve an authentic outlet look. The double set of holes will accommodate two Cir-Kit Plugs. Each package also contains .25" brass brads for use as marker pins when wallpapering. This wall outlet measures a mere .414" high by .3" wide by .13" thick.