The P1 Plumb Plate for Pro Shot L4.7 Magnum Self-Leveling Laser is specifically designed for transferring points from floor to ceiling. It also allows any Pro Shot L4.7 Magnum Self-Leveling Laser to be used for a wide range of applications including aligning walls and tall forms, plumbing operations, layout works, elevator shaft control, and many others. It is easy to install and offers quick set up.