QMSys Threads, Tools and Gauges is a professional thread engineering program for calculation of external and internal threads, tolerances and fits for linear sizes, thread and plain gauges, plug, ring and checking gauges, thread cutting and forming taps. The software is suitable for engineers, metrologists, quality control managers, and mechanics. The results are based on international and national standards, guidelines and regulations and comprise information about nominal and limit values of thread parameters for threaded products, cutting tools, working, setting as well as checking gauges.