Surface processing machines; Surface treatment machines; Grinding tools as machines or parts of machines; Rotary tools for automated or manual cleaning, polishing, texturing or profiling of surfaces and for decoating surfaces; Electric and pneumatic drive units for rotary tools; Rotary tools, rotary brushes, in particular rotary brushes of metal wire or synthetic materials being replacement parts, rotary grinding tools, rotary etching tools; Parts for rotary grinding machines; Clamping apparatus, expanders, chucks for rotary tools, in particular for brush goods, including rotary brushes of wire and other common materials, and for rotary abrasive wheels and rotary grinding wheels