The newly re-designed DigiRoller Plus III can measure lengths, widths and heights, and it can calculate areas, volumes, perimeters and more in U.S. or metric units. The new Digi puts the controls right in the palm of your hand - no stooping, bending or squinting. The DigiRoller Plus III is built to last. It has a reinforced metal shaft and the LCD has an anti-shock mount.