This laser can be used to: Plumb and Align: Walls, Doors, Frames, Stud Beams, Windows and Skylights; Level Electrical Outlets; Stud and Curtain Wall Plumbing, HVAC, Plumbing, Pipe Installation, etc. ; Easily Lay Out Right Angles; Establish Diagonals and Footings for Decks, Porches, and Patios; Grade Determination; Dry Wall Installation. Five highly focused self-leveling laser beams provide accuracy of 1/4-in at 100 feet. Tough on the jobsite. Resists water, dirt and dust IP54