The Klein Tools 935DAGL Is A Digital Level Tool That Detects and Measures Angles Much More Accurately Than Traditional Spirit Bubble Levels. This Inclinometer Can Measure Ranges From 0 to 90-Degree or 0 to 180-Degree With A Display That Rotates When Used In Vertical or Horizontal Orientations. A Target Angle With Audible Alarm Can Be Set, Allowing The User Even Greater Efficiency. The V-Groove Magnetic Base Can Attach to A Miter Saw, Table Saw, Conduit, Pipe, and Other Round or Ferromagnetic Surfaces.