Drilling heads as parts of machines; hand-held tools, other than hand-operated, in the nature of powered drills, power hammer drills, power-driven wrenches, electric planers, power routers, engraving machines, electric hot melt glue guns, hot adhesive guns, spray guns for paint, power-operated staple guns, electric hammers; electric hand drills, not including electric coal borer; electric screwdrivers; machines for making electric batteries; electric arc welding apparatus; electric machines a...