This product (200mm x 200mm) was not compatible with the mounting screw location on my TV (200mm x 400mm).  I had to purchase a set of adaptor brackets to attach to the back of the TV before I could mount it to the swing arm.  It was an oversight I had in buying the swingarm prior to the TV, assuming that all TVs had universal mounting setups.  Other than that nusiance, the product has worked well with my 37 in. LCD flat screen.