METAL BUILDING MATERIALS, NAMELY, FRAMEWORKS AND PARTS THEREOF FOR SUPPORTING GLASS PANES, BOLTS, SLEEVES, WASHERS, SPACERS, BARS AND BRACKETS FOR POINT SUPPORT OF GLASS PANES; LOCKSMITHS' WORK, NAMELY, METAL WINDOW PANE LOCKS; POINT SUPPORTS USED FOR FRAME OF ALL-GLASS CONSTRUCTION AND PARTS THEREFOR ALL MADE OF METAL; HOLDERS, SUPPORTS, BOLTS, SCREWS, CASINGS FOR BOLTS, SPACING SUPPORTS AND HINGES, ALL MADE OF METAL