The RIDGID 36158 micro LM-100 Laser Distance Meter measures only 110mm x 50mm x 28mm and provides simple, quick and accurate distance readings at the push of a button. Simply push the measurement button to turn on the ultra-sharp Class II lasers, point the device at the spot to be measured, and push the measurement button again. The distance reading will appear on the easy-to-read LCD display. This rugged, compact, portable instrument enables professional tradesman to quickly determine distances for piping, measuring trouble spots down the line, and quickly determine spacing for code compliance. Can measure length, volume, add or subtract distances and calculate area.