Delicol 2015 New Ergonomic Articulated Aluminum Alloy Adjustable Arm Rest Computer Wrist Rest Arm Stand (Silver) Three pivot points and 2 adjustable hinges can be fine-tuned Both horizontal direction and vertical direction for ergonomic comfort 18" length at maximum extension Effectively relieves 90% of the weight undertaken by your wrists; Also reduce stress from cervical vertebrae, shoulder and arm 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. FITS DESK SURFACE UP TO 60MM THICK