The Fellowes Keyboard drawer easily attaches to most workstations without tools or complex instructions. Patented clamp attaches unit to desktop (5/8" to 1-1/2" wide) without surface damage. It offers 3 height positions below desktop to ensure personal comfort: 2-13/16", 3-1/2" and 4-1/16". Separate keyboard and mouse platforms allow you to position mouse on right or left side of keyboard tray. Sturdy, impact-resistant tray fits standard and ergonomic keyboards.