6 Builders' hardware of common metals, namely, metal bearings, metal pulleys, metal framing for fly screens, metal connectors for hollow extrusions; small hardware of metal, namely, nuts, bolts and screws of metal, metal hinges, threaded inserts of metal; hardware of metal for doors, namely, metal door rollers, metal hinges, metal door guides, metal door closers, metal knockers; locks of metal; metal mechanical combination locks; metal mechanical dialing locks; metal mechanical safety locks; mechanisms of metal, namely, metal latches, metal latch bars, metal handles, metal winders, for locking windows; mechanisms of metal, namely, metal latches, metal knobs, metal door handles, friction stays of metal for doors, metal carriages, metal rollers, metal trolleys for opening doors; runners of metal for sliding doors; metal spring locks; striking plates of metal for locks; parts of locks, namely, tumblers of metal; buckles of common metal; buckles of metal for connecting webbing and chain; clamps of metal for fixing doors; eyelets of metal; hinge clamps of metal; hinges of metal; metal hooks; metal fittings, namely, metal bearings, metal buckles, rail hooks of metal, metal hangers, metal shrouds, metal end caps, metal hooks, retractable arms of metal, for curtains; stays of metal