Wall and floor covering laser. Projects 90° lines for squaring. Bright highly visible laser lines. Raise from the surface to projectover uneven surfaces and are clear, sharp, and very precise. For all tile and wall and floor covering surfaces. Select 0 and 90° lines plus optional 45° layout line. This provides 0, 45, 90 and 135° layout from a single set. Magnet attachment. Strong magnets on bottom of tool provide secure attachement on positioning plate and other ferrous-metal surfaces. 1-Year warranty.