This item is provided by Crutchfield.com and includes free phone technical support for the life of the product. Details on how to take advantage of this service will be included with your package. Should you have any issues locating information on how to contact Crutchfield Technical Support, please contact this website's Customer Service department. Sturdy, articulating wall-mount brackets Wall mount your compatible Definitive Technology center or surround speaker for easy, out-of-the-way placement. The ProMount 90 swivels 180 degrees , giving you plenty of aim and flexibility. Your speakers attach to the brackets using the speakers' threaded inserts. It's designed to work with Definitive's ProMonitor 600 , ProMonitor 800 , ProMonitor 1000 , Mythos Gems , Mythos Gem XLs , ProCenter 600 (requires two mounts), and ProCenter 1000 (requires two mounts). It's also compatible with all speakers equipped with a 1/4"-20 threaded insert. What's in the Box: 1. 2 black pivoting wall-mount brackets (lock-nut installed) 2. Allen-wrench 3. Instructions