Designed to provide an optional method for installing your JBL Control 419CS/T loudspeaker into sheetrock ceilings, the New Construction Bracket is a pre-installation bracket that can also function as a cutout template for sheetrock plastering. By using this bracket's plaster ring circle, you can cut a hole in sheetrock and then plaster up the ring for a seamless cutout. The New Construction Bracket features flat sheet metal with wings that attach to the building structure.