OmniMounts 20.0 Universal Speaker Ceiling mount is designed for medium to large speakers up to 20lbs. Can be used with speaker with a Single threaded insert (3/8"-16), Double threaded insert ( 2 1/4"-20) or speakers with out inserts by using the included wood screws for direct attachment. All Steel constructed Ball Joint design allows for unilimited angle adjustments. All hardware included. Available in Black and White. Sold as Single Unit (1mount).