This is a new design. Delicate appearance with steel construction can supports less than 10lbs (4.5kg), and it fits 1/4" 20, 4mm and 5mm of the thread size. Clamping design fastens the ball stably, then the ball design , swing and rotating perfectly. In addition, each mount has 2 toggler bolts, so the mount can be installed on drywall/rocksheet.