The Luxrite LR41005 is a universal new construction square mounting plate designed to provide sturdy rough-in support for ultra-thin recessed LED downlights. This heavy-duty galvanized steel plate features adjustable hanger bars and pre-cut multi-size knockout rings, allowing it to seamlessly adapt to various joist spacings and fixture diameters. It is the ideal hardware accessory for mapping out and securing lighting layouts prior to drywall installation in new residential builds and commercial developments.