Peerless-AV PRGS-UNV | Precision Projector Mount with Spider Universal Plate Black 50 lb. Weight load capacity Patent pending precision gear provides accurate projector image alignment Two adjustment knobs control projector image alignment Horizontal wrench access slots make flush mounting installations fast &amp; easy Pre-assembled design reduces installation time Weight capacity: 50 lbs. Black mount with universal spider adapter Precision gear reduces installation time and makes mount easier to align by simply turning adjustment knods