Universal Level, 9 3 4 in L, 1 Vial, Aluminum ORS NASCO Formed steel legs Strut tension palate Formed steel legs Strut tension palate for superior lateral support Quick action lock washer for fast height positioning Patented Fall Guard™ feature allows 1" safety zone around lock washer Set screw can lock jack head to stand for transportation no loose pieces iron and other ferrous metals setting predetermined pitch of a string of pipe including the underside of a pipe or beam Features 360º adjustable dial bubble protractor Cast in table indicates rise per foot in inches and meters Cast in groove makes level self centering on contour of the pipe