It's essential to have the right tools for a seamless installation of your Virtually Invisible 791 Series Ii In-Ceiling Speakers, and this Rough-In Kit is designed specifically for that purpose. This kit ensures an accurate ceiling hole size during the installation process, making it an indispensable tool for new construction projects. The kit contains components for two speakers, making it a comprehensive solution for dual speaker setups. It's strategically designed for installation after the joists are in place but before the wallboard is added. This timing ensures a clean, professional installation without any unnecessary damage or adjustments to your wallboard. Once installed, this Rough-In Kit not only reserves the exact space needed for each speaker but also provides clear indications of where to cut the speaker hole in the wallboard. This feature significantly simplifies the installation process, reducing the chances of errors and saving you valuable time.