Johnson Level Self- Leveling Cross and Line Laser

Johnson's 40-6648 self-leveling cross and line laser combines the features of a cross line with an additional 90 degree plumb line useful for checking square reference of beams, posts or any other object. A 1/4 In. to 20 tripod thread and manual mode also let you project orthogonal lines at any angle, for stairs and other non-level applications.