The re-designed DigiRoller can measure and calculate length, width, height, area, volumes and perimeters, including circular calculations. It measures up to 9,999,999 ft., yd., in., or me. The DigiRoller's rugged handle-mounted controls and large, glove-friendly TrueTac buttons make it easy to use the controls and read the display with no stooping, bending or squinting. And, it0s built to last. It has a reinforced metal shaft and the LCD has an anti-shock mount. It is a great tool for general contractors and concrete contractors, estimators, surveyors and landscapers.