A tool for mounting at electric outlet device may include an one gang template to mount a one gang electric outlet device, and a two gang template to mount a two gang electric outlet device. The one gang template may be positioned within the two gang template. The tool may include a first leveling device, and the tool may include a second leveling device. The first leveling device and the second leveling device may be positioned within the one gang template, and the one gang template may include a substantially L-shaped slit. The two gang template may include a substantially L-shaped slit, and the tool may include a marking device holder for holding a marking device. The marking device holder may be positioned within the one gang template.