The Heavy Duty TV Lift and Swivel mechanism is a heavy duty lift mechanism with full bi-directional swivel that employs the same iconic drop and roll flap mechanism as the Plasma Lift Range . Built with a rack and pinion system, the elaborate guide system ensures a smooth and robust lifting action. The heavy duty swivel mechanism makes the product ideal for indoor marine applications and for large screens over 50” or where you wish to have a deep speaker or VC Camera mounted with the screen. (Without swivel see ML)