The calculation is designed for geometrical design and complex strength check of shafts. Application is developed in MS Excel, is multi-language and supports Imperial and Metric units. Is based on AGMA, ISO and DIN standards and support many 2D and 3D CAD systems (AutoCAD, AutoCAD LT, IntelliCAD, Ashlar Graphite, TurboCAD, Autodesk Inventor, SolidWorks, SolidEdge, Pro/E)