INCRA\’s Precision Marking Rules offersunparalleled accuracy. Also available in a Metric 150mm or 300mmsize. Incra scores again with its Precision Marking Rule. Select the proper slot or hole, insert a 0.5mm mechanical pencil, and mark the measurement with dead-on accuracy. The combination Metric/Imperial rule hasmarking holes every1mm as well as every 1/20th inch. This is unmatched in the industry of marking rules!