Dantech Rotating Desk Extension Elbow Pad Armrest - Aluminum Alloy Arm Stand Wrist Rest, Lift Adjustable, Sliver (Adjustable (1 Pack)) Easy to use - Portable and installed simply. Unscrew to attach to desks, adjustable to desks up to 2.2 inches thick. Effectively relieves up to 90% of the weight undertaken by your wrist; also reduces stress from cervical vertebrae, shoulder and arm. Ergonomically Designed for IT Professional Computer Monitor Working, Keep correct posture, avoid cervical vertebrae ache and nearsightedness. Strong aluminium alloy material construction provides durability, flexibility and adjustability, supporting up to 10kgs (or 22lbs) Uniquely design makes your hand move freely, comfortably and effortlessly to work on your computer.  Health Care - Alleviate strain and pain of eyes, shoulders, wrists, and neck areas caused by long-term use of computer and long hours staring at the screen, helping prevent carpal tunnel syndrome from developing.