Stabila FLS 90 Floor Line Laser Level Prism Pole This detector enables construction professionals SR10100 This detector enables construction professionals to use the green beam rotary lasers in high ambient light conditions when the beam is invisible to the human eye The Northwest Instrument NTP12 Prism Pole Tripod 90112 provides surveying professionals with the perfect design for mounting and stabilizing their surveying rods This floor line laser utilizes the new Stabila floor line optics that focus the 635 nanometer laser lines and provide optimal level of visibility for up to 50 feet or extended 490 feet when paired with Stabila REC 210 Receiver (not included) straight laser lines that provide a perfect 90 degree angle useful for checking the squareness of walls or accurately laying out floor tiles