21 PORTABLE ELECTRIC DRILLS AND PARTS THEREOF, PORTABLE ELECTRIC VALVE GRINDERS; PORTABLE ELECTRIC SCREW, BOLT, AND NUT DRIVERS; [ ELECTRIC AIR PUMPS AND AIR COMPRESSORS, PORTABLE ELECTRIC AUGERS AND POST GRINDERS, ] ELECTRIC BENCH AND FLOOR GRINDERS, ELECTRIC AERIAL GRINDERS, AND PORTABLE ELECTRIC TAPPERS AND STUD SETTERS