Traditional manual devices serve as specialists, as well as workers. An ax is a manual device that can be used for cutting wood, manufacturing wooden parts. The ax constructively consists of: handle (wood), blade (metal). Teslo is a device in which the handle is located at an angle of 90 degrees to the blade. Axes have their own purpose from the type of task performed — for the executioner, lumberjack, firefighter, etc. D.