PanaVise 110120B 20 lb. Speaker Mount Double knuckle design for twice the adjustability Two adjusting points offer a full range of motion:210 Tilt, 360 Turn &amp; 360 Rotation Cast aluminum surface mounting plates include an extra hole for routing speaker wire up to 8mm thick Plastic coated, steel safety cable and mounting hardware included Mounting plates are 2.25"x 3.25" (57.1mm x 82.5mm)