Keyboard drawer features a patented clamp system that attaches to any work surface 5/8" to 1-1/2" without tools. Tray adjusts to three height positions below desktop (21-3/16", 3-1/2" wide) without tools and offers tilt adjustments (3, 6 and 9 degrees) for a custom fit. Mouse can be positioned to right or left side. Tray features Memory Foam wrist rest and a 19-1/2" track.