Abrasive disks for power-operated grinders; Abrasive wheels for power-operated grinders; Brushes and brush holders for use in rotating electrical machinery; Flap discs for power-operated grinders; Grinding and polishing machines; Kits comprised of sandpaper sheets configured to fit power-operated sanders; Machine parts, namely, rollers coated with synthetic material; 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; Power-operated abrasive wheels; Power-operated angle grinders; Precision machine tools, namely, hard metal tools, high speed steel (HSS) tools, carbide tools, ceramic tools, poly crystalline diamond (PCD) tools, and diamond-coated and diamond-uncoated tools, and hard metal tools, all for use in the cutting and forming of materials by others; Rotary brushes for machines; Wheel adapters for power-operated grinders; Wire wheels for power-operated grinders