rods of metal for welding; hinges of metal; fittings of metal for windows; rivets of metal; metal nails; crampons of metal [cramps]; cramps of metal [crampons]; nuts of metal; bolts of metal; eye bolts; screw rings; wall plugs of metal; screws of metal; props of metal; fittings of metal for building; washers of metal; door fittings of metal