LOCKING KEY

Building materials of metal; building parts of metal; building products of metal; metal articles for use in building; metal building materials; metal fittings for buildings; all of the aforementioned for use in suspended ceiling systems and ceiling grids, parts and accessories therefor

Brackets, not of metal, for building; building materials, not of metal; non-metallic building components; non-metallic building elements; non-metallic materials for use in building; non-metallic materials for use in building construction; reinforcing materials, not of metal, for building; all of the aforementioned for use in suspended ceiling systems and ceiling grids, parts and accessories therefor