Abrasive disks for power-operated grinders; Bits for power drills; Blades for power saws; Blades for power tools; Circular saws; Core drilling bits; Extension bars for power tools; Extensions for power drill bits; Grinding and polishing machines; Grinding tools for grinding machines; Pads for floor polishing machines; Power-operated grinding wheels; Power-operated screwdrivers; Power saw blades; Power saws; Tool bits for machines