Brushes being parts of machines; abrasive wheels for power-operated grinders; machine parts, namely, grindstones, slide rests, holding devices for machine tools, diamond brushes, abrasive disks, abrasive wheels; tool bits for machines; tools being parts of machines, namely, abrasive bricks, abrasive pads, abrasive brushes, abrasive rubbers, abrasive tools with Frankfurt type shoe, all to be installed on Frankfurt plates for automatic, semi-automatic and manual polishing machines for grinding, honing and polishing of tiles and/or slabs of natural stone and artificial surfaces; tools being parts of machines, namely, tangential abrasives, abrasive segments, abrasive pads, abrasive brushes, abrasive rubbers, abrasive tools with Fickert type shoe, all to be installed on tangential or Fickert polishing heads for automatic, semi-automatic and manual polishing machines for grinding, honing and polishing of tiles and/or slabs of natural stone and artificial surfaces; tools being parts of machines, namely, wheel abrasives, wheel brushes, wheel rubbers, abrasive tools with snail lock, calibrating wheels, cutting wheels, all to be installed on rotating arbor polishing heads for automatic, semi-automatic and manual polishing machines for grinding, chamfering, honing and polishing of flat edge and/or bull nose shaped surfaces of natural stone, slabs/tiles and artificial surfaces; abrasive bricks, abrasive pads, abrasive brushes, abrasive rubbers, abrasive tools with Frankfurt type shoe, all to be installed on Frankfurt plates for automatic, semi-automatic and manual polishing machines for grinding, honing and polishing of tiles and/or slabs of natural stone and artificial surfaces, being parts of machines; tangential abrasives, abrasive segments, abrasive pads, abrasive brushes, abrasive rubbers, abrasive tools with Fickert type shoe, all to be installed on tangential or Fickert polishing heads for automatic, semi-automatic and manual polishing machines for grinding, honing and polishing of tiles and/or slabs of natural stone and artificial surfaces, being parts of machines; wheel abrasives, wheel brushes, wheel rubbers, abrasive tools with snail lock, calibrating wheels, cutting wheels, all to be installed on rotating arbor polishing heads for automatic, semi-automatic and manual polishing machines for grinding, chamfering, honing and polishing of flat edge and/or bull nose shaped surfaces of natural stone, slabs/tiles and artificial surfaces, being parts of machines; edge polishers, namely, machine tools for the processing of marble, granite, quartz, stone and ceramic, being parts of machines