Sleek, low profile design features a plastic switch and housing. No mounting hardware required. Snap mounts in a 13/16" x 1-7/16" hole. Uses standard female disconnect wire terminals. On/Off great for lights, aerators, bilge pumps. On/Off/On is great for navigation lights and anchor lights. On/Off/Mom is great for lights and a horn. Illuminated rocker switches have the same features with a addition of an illuminated power on indicator.