Caveat: The quality is adequate for the price. But you should note two things essential: The supplied mounting hardware (screws and dowels) are useful only under perfect Bedinungen, for example in a massive concrete wall. All other walls need other screws and plugs! In addition, all screws (Allen) should be tightened. After installation it is worth 15-20 times without TV to move the construction to see whether loose screw elements to then follow suit accordingly. I squeezed with a large side cutter, the threads of the screws in the arm members so that not solve the locknuts by the movement.