Machine tools; parts of machine tools, in particular clamping tools and grippers as well as units for machine tools; chucks for tools for milling machines, for lathes, for machining centers, for rotary transfer machines, for transfer lines and for drilling machines; mandrels [parts of machines]; machine tool holders, shrinking chucks, tool holding fixtures, collet chuck mounts as well as hydraulic expansion chucks as parts of machine tools; taps, thread milling cutters, thread molding machines, reamers as well as screw taps, thread milling cutters, thread molding machines, sinking tools, high-precision cutter heads and drill rods as parts of machine tools; metal working machines; positioning tables, drill chucks, tool mounts (machine parts); machine tool holders for the clamping of tool shanks; machine tool holding fixtures