It is used to determine the apparent inclination of an object or surface and for matching water level elevations at locations that are too far apart for a spirit level to span.With high-tensile steel tape and stainless steel conductors, for measuring depth-to-water in wells, boreholes, direct-push equipment, and standpipes. The yellow tape is easy to read and resists stretching under loads of 127 kg (280 lbs) for greater accuracy.