Tannoy PMK 6 IW Pre-Mount Kit For PCI And QCI 6" Wall-Mount SpeakersThe PMK 6 IW pre construction bracket is designed for Tannoy PCI 6DC IW and QCI 6DC IW in wall speakers. The pre construction bracket is used during framing and before applying sheetrock to mark out the speaker location for easy installation. The PMK 6 IW is simply attached to the wall joists before the drywall is installed. This ensures precise speaker placement and helps make your installation go smoother. The bracket uses adjustable metal wings