Essential tool for serious building pros, contractors, and architects. Calculates directly in feet, inches, fractions, yards, meters, centimeters, millimeters - including square or cubic formats of each. Converts to and from any dimensional formats instantly. Custom rafter keys give you common rafters, regular and irregular hips, valleys, and jacks. Enhanced Stair key finds number of risers and treads, riser height and tread width, stringer length, incline angle. New Pro features include; block and footing keys, rafter cutting angles, roof areas, column/cone solutions, backspace key and D.M.S. to decimal degree conversions. Also includes board feet estimating, weight-per-volume conversions, 3 memories, paperless tape remembers last 20 entries and more. Includes 2 batteries (model No. LR44). Boxed.