4Pieces full metal plate with slots version,very flexible hardware for affixing lighting fixtures to electrical boxes Light fixture mounting bracket to allow different alignments and its sturdy construction, it very easy to use. Light crossbar kit can withstand up to 40 lbs.cross bar is designed for use with light fixtures and not ceiling fans. Lighting fixture with screws and nuts has thickness and will not be deformed,the light crossbar be install on the ceiling. Light mounting bracket ideal for pendant Lamps,Wall Lamps , Living Room Lamps, outdoor wall light,mirror lamps, dressing table lamps, kitchen wall lamps…