Johnson Construction Master Calculator

Johnson’s Construction Master Calculator provides quick and accurate solutions for layout work and estimates， including pre-programmed right angle and stair calculations. Use it in the field or office to save time and reduce costs. Its oversized LCD is easy to read and converts measurements in both English and Metric. Comes with durable protective case， user manual and handy reference guide. Ideal for contractors， carpenters， estimators， builders， engineers and more.