309-5D (lift and stretch) office furniture hardware chrome-plated adjustable armrest parts-5D is an important part of office furniture. It is made of hardware and is chrome-plated, which makes it not only visually have a bright metallic luster, but also has excellent wear resistance and rust resistance. Its lifting and stretching design is ingenious, and users can easily adjust the height and other positions of the armrests according to their own needs to achieve the most comfortable state. The 5D feature is a highlight, which means that it can be flexibly adjusted in multiple dimensions, whether it is front and back, left and right, up and down or rotation angle, it can be accurately adjusted, greatly improving the comfort of office work.