Machine parts, namely, polishing discs for angle grinder, electric drill and bench grinder; 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; Abrasive disks for power-operated grinders; Diamond-pointed metal-cutting tools; Drill chucks for power drills; Extension bars for power tools; Abrasive disks for power-operated sanders