Adjustable aluminum level and gauge features a 3-piece design, 56 inches to 58 inches gauge range. An economical way to measure two inches of gauge variation to 1/16 inch accuracy. Slide rule action and large type scale for easy reading. Gauge setting can be locked with thumb screw. Also measures cross elevation from 1 to 7-inches with 1/8-inch accuracy. Weight: 11 pounds. Product of Aldon ® Company