Wall plate is only 18" so very difficult to mount on plasterboard wall with 24" joists. I would reccomment that it is only used for TV's up to 40". I tried a 60" Plasma and it sagged very badly, so I had to remove TV immediatly. Extension arm is fitted with plastic washers that are squeezed out when any load is put on it, causing the sag. Fittings supplied with bracket are very comprehensive and it would be suitable for all makes and models but nothing to heavy.