Features 1 Back angle and slope comparison table for easy comparison Double circle fluorescent blisters with high strength and easy to use 2 Precision indicator clear dial accurate measurement 3 The handle is user friendly comfortable to hold and easy to use 4 Suitable for measurement of slope and inclination angle of civil engineering pipeline engineering and interior decoration engineering 5 Multi functional Slope Gauge Engineering Inclinometer Slope Measuring Ruler Universal Slope Degree Multi functional Slope Measuring Instrument HOW TO USE 1 Turn the rotary wheel to align the pointer with the slope angle 2 Touch the measuring surface of the measuring instrument to the set item and move the set item until the level tube bubble is centered Specifications Size 250X125X25MMMeasurement range 0 130mmMeasurement accuracy 0 01Type With strong magnetic Package includes 1 Inclinometer