Ergonomic Design: fully 180 rotating, you can choose the most comfortable angle for yourself, correct sitting posture and protect your wrist, prevent nearsightedness and cervical spondylosis, improve working conditions.Adjustable desk arm rest support: Folding design, it is convenient for users to fold and store at 90when they are not needed, and does not take up your space, which is adaptable for your left and right hand, effectively relieve shoulder and arm pressureDesk Extension: The computer arm rest provides extra area to support your arm. It is comfortable to rest your arm for typing and relieve stress on your wrists and shoulders. It can increase the use of space on your desktop, you can place more important work materials, screen setups and decorations on your desktop.Great for Your Health: The armrest extender is perfect for supporting arm weight. Relieve strain and pain in eyes, shoulders, wrists, and neck caused by prolonged computer use. Ideal for office workers, designers, programmers, etc.Easy to Install: The armrests are very lightweight and easy to assembly. Screw the arm rest to your desk (up to 2.35" thickness) with a hand. They feature padding that protects the desk surface from scratches. It can be easily rotated and placed in a briefcase or computer bag.