... it. 3. Accuracy: +3/8"/100ft. Two highly focused self-leveling laser beams provide accuracy of ... , HVAC, Plumbing, Pipe Installation, etc.; Easily Lay Out Right Angles; Establish Diagonals and Footings for Decks ... , HVAC, Plumbing, Pipe Installation, etc.; Easily Lay Out Right Angles; Establish Diagonals and Footings for Decks ... Other Models picture for reference: Two Beam Laser Level-1V1H Laser Level