Machine parts, namely, grindstones; Grinding tools for grinding machines; Power-operated grinding wheels; Blades for power tools; Abrasive disks for power-operated sanders; Blades for electric rotary cutting machines; Abrasive belts for power-operated sanders; Abrasive wheels for power-operated grinders; Power-operated grinding wheels for optical lens grinding; Kits comprised of sandpaper sheets configured to fit power-operated sanders; Polycrystalline diamond compact (PDC) drill bits for dri...