Johnson Dot laser levels are your best choice when you want to find a level point, or points at 90 degrees between a wall, the floor and the ceiling. All Johnson dot laser levels are self leveling, so you get an accurate measurement instantly, even on uneven ground. Johnson Dot laser levels are easy to see because of the concentrated beam, and can even be used outside with a laser detector. Johnson dot laser levels are available in two-beam, three-beam, and five-beam dot laser level models to meet the needs of every construction application. Common uses of dot laser levels are setting foundations and footings, alignment of concrete forms, and layout of interior walls, electrical wiring & outlets, plumbing pipes, cabinets, countertops and MUCH more.