As a result of using this product, I found that it was quite a disappointment. Despite being marketed as an "Industrial and Scientific" tool for dimensional measurement, it did not deliver accurate results. The only pro was that it seemed well-made, but that hardly matters when it can't do its primary job properly. The cons far outweighed any positives, as it ultimately proved to be a waste of time and money. Save yourself the hassle and look for a better alternative.