Projects 90 deg lines for squaring, with laser lines positioned in front of laser base for easy centering over point and precise adjustment. Bright highly visible laser lines raise from the surface to project over uneven surfaces and are clear, sharp and very precise for all tile and wall/floor cover surfaces. Water and dustproof to ensure years of dependable operation (certified at IP54). Strong magnets on bottom of tool provide secure attachment on positioning plate and other ferrous metal surfaces.