The Kensington Underdesk Adjustable Keyboard Platform with Wrist Rest fits any size desk space with three adjustable platforms. Use all three platforms for a large mousing area or remove a platform to fit smaller desk areas. The low-profile articulating arm adjusts six inches in height, tilts +/- 15 degrees and rotates 360 degrees to match for optimal ergonomic comfort. This SmartFit system also includes a keyboard wrist rest for added comfort while typing.