3M Keyboard Trays are the ultimate solution for maximizing workplace comfort and productivity with the support you need and comfort you want. Easily adjustable for height and tilt with unique hand lever mechanism. Sit/stand feature allows alternation between sitting and standing which reduces repetitive motion that can lead to repetitive stress injuries by allowing more variation in work positioning. Gel wrist rests for keyboard and mouse platforms add comfort by minimizing pressure points. Highly adjustable mouse pad can mount left or right. For corner workstations or straight-on workstations that can accept a 22.375" track. Lifetime warranty. Also try 3M copy holder.