Keep your keyboard at an ergonomically correct height and tilt position. Tray tilts and locks to a comfortable angle with five settings: -15, -7.5, 0, 7.5, 15. High-quality ball bearing tracks for easy glide; smooth and quiet sliding. Wrist rest with built-in storage compartment for pens, paper clips, keys, reading glasses and more. Rear safety ledge prevents devices from slipping. Easy to mount to any work surface. Sturdy metal clamp with rubber pad fits onto desks or tables up to 1.8" thick. Slides completely under desk when not in use.