All sturdy aluminum alloy metal short length type TV/Monitor headrest mount bracket with a steel plate that has 75 & 100mm VESA standard holes Optimum headrest mount solution for about 13 up to 25 inches monitors Holds up to 10Kg monitors in weight Attach quickly and easily without the need for permanent fixing All high quality sturdy aluminum and steel metal alloy Sturdy gear-interlocking structure on each connection to give a solid and secure fixing without any idle spinning Adjustable to fit any headrest poles with bar angle extension from 120mm to 160mm No tools required to fit the mounting bracket to the headrest Adjustable Angles-The arm will rotate up to 180 from side to side The mounting plate will rotate up to 180 from top to bottom and also rotate through 360 enabling the TV to be levelled