Abrasive disks for power-operated grinders; Diamond-pointed metal-cutting tools; Flap discs for power-operated grinders; Grinding tools for grinding machines; Machine parts, namely, polishing discs for floor polishing machines; Pads for floor polishing machines; Polishing discs for automated wet-polishing multi-head machines; Polishing system for use in single-head machines comprising grinding and polishing discs for stone profiling and edges