Empire, True Blue, 9", Professional Torpedo Level, V-Grooved Edge Helps Hold The Level In Place On Pipe Or Conduit, Heavy Duty Frame, Shock Absorbing Endplates Help Protect The Frame From Damage, True Blue Vials Help Provide Accurate Plumb, Level & 45 Degree Readings, Accuracy Of Up To 0.0005" Per Inch In All 10 Level & Plumb Working Positions, Continuous Length Magnetic Edge For Holding Power On Steel Studs & Other Surfaces, Compact Size Fits In Cramped Spaces, Small Enough To Slide Into A Pants Pocket.