7 [ Power and manual lawn mowers; ] power tools, namely, screwdrivers, tackers, staplers, breakers, compactors, pulverizers, post drivers, post pullers, chipping hammers, diggers, ground rod drivers, impact wrenches, intensifiers, tampers, pumps, crimpers, cutters, pruners, [ weed trimmers, ] welders, drive heads, grinders, rotary excavators, scalers; pneumatic drills, pneumatic hammers, pneumatic nailers and pneumatic fasteners