A Spirit Level is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). This program will help you install a refrigerator or washing machine. The built-in ruler will help you measure the distance between the holes to hang a shelf or a picture. Main advantages: accuracy of measurement, easy to use, stylish design, show incline, ruler (dimension length, zero level with audible indication, calibration, different display modes, measuring angles of slope, angle measurement with hold function and the calculation of the angle. This tool will be of great help to you.